Skip to content

Main Navigation

Biology Online Logo
  • Dictionary
  • Articles
  • Tutorials
  • Biology Forum




Biology Dictionary: I

Search or browse the dictionary for the definition of biology terms starting with the letter “I”.

  • Featured Terms
  • All Terms
  • Popular Terms
  • Aa
  • Bb
  • Cc
  • Dd
  • Ee
  • Ff
  • Gg
  • Hh
  • Ii
  • Jj
  • Kk
  • Ll
  • Mm
  • Nn
  • Oo
  • Pp
  • Qq
  • Rr
  • Ss
  • Tt
  • Uu
  • Vv
  • Ww
  • Xx
  • Yy
  • Zz
Dictionary > I
AllC

-

  • -iatry
  • -ide
  • -ish
  • -ism
  • -ismus

I

  • I band
  • Ianc
  • Iccosome
  • Ice
  • Ichthyology
  • Icosahedral
  • Ictus cordis
  • Ida
  • Ideal
  • Idee fixe
  • Identical
  • Identification
  • Identity
  • Idioblast
  • Idiojunctional rhythm
  • Idiomorphic
  • Idiomuscular contraction
  • Idiosyncratic
  • Idle
  • Idose
  • Idu
  • Ignite
  • Ignition
  • Ileotransversostomy
  • Ileum
  • Ilia
  • Iliac
  • Ilial
  • Iliopubic tract
  • Ilium
  • Illness
  • Illness period
  • Illumination
  • Illusion
  • Illustrate
  • Image
  • Imagery
  • Imbalance
  • Imbibe
  • Imbricate
  • Imine
  • Imino acid
  • Iminostilbenes
  • Imitation
  • Immaculate
  • Immature
  • Immediate
  • Immerse
  • Immersion
  • Imminent abortion
  • Immobilisation
  • Immortalization
  • Immovable joint
  • Immovables
  • Immune cytolysis
  • Immune response
  • Immune system
  • Immunisation
  • Immunity
  • Immunization
  • Immunocompromised
  • Immunodeficiency
  • Immunogen
  • Immunogenic
  • Immunogenicity
  • Immunoglobulin
  • Immunoglobulin A
  • Immunological
  • Immunology
  • Immunomodulatory
  • Immunostimulator
  • Immunosuppressant
  • Immunosuppression
  • Immutable
  • Imp
  • Impact
  • Impaction
  • Impairment
  • Impalefection
  • Impedance
  • Impenetrability
  • Imperfect flower
  • Impermeability
  • Impermeable
  • Impermeant
  • Impervious
  • Impetus
  • Implantation
  • Implication
  • Implications
  • Implicit
  • Implosive therapy
  • Imposition
  • Impotence
  • Impregnable
  • Impregnate
  • Impregnation
  • Imprescriptible
  • Impressio cardiaca hepatis
  • Impressio ligamenti costoclavicularis
  • Impressio trigeminalis
  • Impression
  • Impression for costoclavicular ligament
  • Impressiones digitatae
  • Impressions
  • Impressions for cerebral gyri
  • Imprinting
  • Impulse
  • In situ
  • In situ hybridization
  • In vitro
  • In vivo
  • Inactivate
  • Inactive
  • Inactive mutant
  • Inactive repressor
  • Inadequate
  • Inanimate
  • Inanition fever
  • Inapparent infection
  • Inappropriate adh syndrome
  • Inborn
  • Inborn error of metabolism
  • Inborn Reflex
  • Inbred strain
  • Inbreeding
  • Inbreeding depression
  • Incandescent
  • Incentive
  • Incest
  • Inches
  • Incident light
  • Incidental parasite
  • Incipient Species
  • Incision
  • Incisura
  • Incisura acetabuli
  • Incisura ischiadica minor
  • Incisura vertebralis
  • Incite
  • Inclination
  • Incline
  • Inclusion
  • Inclusion bodies
  • Inclusions
  • Inclusive
  • Incompatibility
  • Incompatible
  • Incompete cleavage
  • Incompetence
  • Incomplete
  • Incomplete antibody
  • Incomplete dominance
  • Incomplete metamorphosis
  • Incomplete penetrance
  • Incongruous
  • Inconsistent
  • Incorporate
  • Incorporation
  • Increment
  • Incremental
  • Increments
  • Incubation
  • Incubation period
  • Incubatory carrier
  • Incubus
  • Inculcate
  • Incumbent
  • Incursion
  • Incyclotropia
  • Indefinite
  • Indent
  • Indentation
  • Indentations
  • Independence
  • Independent
  • Indeterminate
  • Indeterminate cleavage
  • Index
  • Index fossils
  • Indexical signs
  • India ink capsule stain
  • Indicate
  • Indication
  • Indicator
  • Indicator Species
  • Indicators
  • Indicators and reagents
  • Indices
  • Indifferent
  • Indifferent cell
  • Indifferent electrode
  • Indigenous
  • Indigestion
  • Indirect life cycle
  • Indispensable
  • Individual
  • Individual tolerance
  • Individual Variation
  • Individualism
  • Indivisible
  • Indolent
  • Indomalayan realm
  • Induce
  • Induced enzyme
  • Induced fit model
  • Induced Mutation
  • Inducer
  • Induction
  • Induction period
  • Inductor
  • Inductothermy
  • Indulge
  • Indulgence
  • Indusium
  • Industrial Microbiology
  • Industry
  • Inert
  • Inertia
  • Inevitable
  • Infant
  • Infect
  • Infection
  • Infectious
  • Infectious disease
  • Infectious heredity
  • Infective stage
  • Infectivity
  • Inference
  • Inferences
  • Inferior
  • Inferior margin
  • Inferior surface of tongue
  • Inferior thalamic peduncle
  • Inferior tibiofibular joint
  • Infestation
  • Infinity
  • Infirmities
  • Infirmity
  • Inflammatory response
  • Inflated
  • Inflation
  • Inflection
  • Inflorescence
  • Inflow
  • Influence
  • Influenza
  • Informal
  • Informational rna
  • Infraciliature
  • Infraction
  • Infradian rhythm
  • Infraorder
  • Infrapatellar synovial fold
  • Infrared
  • Infrascapular region
  • Infundibuliform
  • Infundibulo-ovarian ligament
  • Infundibulum
  • Infusion
  • Infusoria
  • Ingenuousness
  • Ingestion
  • Ingredient
  • Ingredients
  • Ingress
  • Inhalation
  • Inhale
  • Inherent
  • Inherit
  • Inheritable
  • Inheritance
  • Inherited trait
  • Inhibit
  • Inhibiting Factor
  • Inhibitors
  • Inhibitory postsynaptic potential
  • Initial
  • Initial dose
  • Initials
  • Initiation
  • Initiation codon
  • Initiation complex
  • Injection
  • Injury
  • Inlet
  • Inlet of larynx
  • Innate
  • Innate immunity
  • Inner cell mass
  • Innervate
  • Innervation
  • Innocuous
  • Innovation
  • Ino-
  • Inoculating loop
  • Inoculation
  • Inoculum
  • Inorganic
  • Inorganic catalyst
  • Inorganic compound
  • Inorganic molecule
  • Inorganic Phosphate
  • Inorganic salt
  • Inquiry
  • Inscribe
  • Inscription
  • Inscriptions
  • Insect
  • Insect Behavior
  • Insect control
  • Insecta
  • Insecticide
  • Insectivore
  • Insemination
  • Insensible perspiration
  • Insert
  • Insertin
  • Insertion (genetics)
  • Insertional mutagenesis
  • Inside out vesicle
  • Insidious
  • Insight
  • Insight learning
  • Insinuate
  • Insolent
  • Insolubility
  • Insoluble
  • Insoluble soap
  • Inspiration
  • Inspiratory capacity
  • Inspiratory reserve volume
  • Inspire
  • Installation
  • Instantaneous
  • Instantaneous Speciation
  • Instillation drug
  • Instinct
  • Institution
  • Instream cover
  • Instruction
  • Instructive theory
  • Instrumental
  • Insufflation
  • Insular
  • Insulate
  • Insulation
  • Insulin
  • Insult
  • Insults
  • Intact
  • Intake
  • Integral
  • Integral membrane protein
  • Integral monotopic protein
  • Integral protein
  • Integrant
  • Integrated Control
  • Integration
  • Integrin
  • Integrity
  • Integument
  • Integumentary system
  • Integumentum commune
  • Intensification
  • Intensities
  • Intensity
  • Intensive
  • Interaction
  • Interbreed
  • Intercalary meristem
  • Intercalary neuron
  • Intercalate
  • Intercalated
  • Intercalated discs
  • Intercellular
  • Intercentrum
  • Intercept
  • Interchange
  • Intercross
  • Interdigital folds
  • Interdigitation
  • Interest
  • Interface
  • Interfascicular fasciculus
  • Interfere
  • Interference
  • Interference competition
  • Interferon
  • Interferons
  • Interior
  • Interkinesis
  • Interludes
  • Intermaxillary segment
  • Intermaxillary suture
  • Intermaxillary traction
  • Intermediary
  • Intermediary metabolism
  • Intermediate
  • Intermediate filament
  • Intermediate filaments
  • Intermediate host
  • Intermediate metabolism
  • Intermediate Neurone
  • Intermediate parts
  • INTERMEDIATE PHENOTYPE
  • Intermembrane space
  • Intermittent
  • Intermolecular force
  • Internal
  • Internal acoustic meatus
  • Internal auditory canal
  • Internal capsule
  • Internal conjugate
  • Internal naris
  • Internal oblique line
  • Internal os
  • Internal respiration
  • Internal surface
  • Internal urethral sphincter
  • Internalization
  • Interneuron
  • Internode
  • Interoceptor
  • Interoceptors
  • Interphase
  • Interpose
  • Interpretation
  • Interpretations
  • Intersection
  • Intersections
  • Interspecific competition
  • Interspecific hybridization
  • Intersperse
  • Interspersed repeat
  • Interstices
  • Interstitial
  • Interstitial fluid
  • Intertriginous
  • Interureteric fold
  • Interval
  • Intervals
  • Intervene
  • Intervening sequence
  • Intervenous tubercle
  • Intervention
  • Interzonal mesenchyme
  • Intestinal mucosa
  • Intestinal tract
  • Intestine
  • Intestinum crassum
  • Intestinum tenue mesenteriale
  • Intimate
  • Intine
  • Intolerance
  • Intoxicant
  • Intoxication
  • Intra-articular cartilage
  • Intracatheter
  • Intracellular
  • Intracellular digestion
  • Intracellular fluid
  • Intramolecular force
  • Intraspecies
  • Intraspecific
  • Intraspecific Competition
  • Intraspecific competition
  • Intraspecific hybridization
  • Intratendinous bursa of elbow
  • Intravenous
  • Intravenous injection
  • Intrinsic
  • Intrinsic factor
  • Intrinsic muscles
  • Intrinsic pathway
  • Intrinsic protein
  • Intrinsic sympathomimetic activity
  • Introduced Species
  • Intron
  • Introvert
  • Intrude
  • Intrusion
  • Intrusive
  • Intuitive
  • Inundation
  • Invade
  • Invagination
  • Invalid
  • Invariable
  • Invariant
  • Invasins
  • Invasion
  • Invasion index
  • Invasive species
  • Invasiveness
  • Inventory
  • Inverse
  • Inversion
  • Invert
  • Invertase
  • Invertebrata
  • Invertebrate
  • Invertebrate zoology
  • Invest
  • Investigation
  • Investing tissues
  • Inveterate
  • Inviability
  • Invisible spectrum
  • Involucre
  • Involucrum
  • Involuntary
  • Involuntary nervous system
  • Involuntary Response
  • Involute
  • Involution
  • Involution form
  • Involved
  • Inward
  • Iodamoeba
  • Iodine
  • Ion
  • Ion carrier
  • Ion channel
  • Ion Pump
  • Ionic bond
  • Ionization
  • Ionization constant
  • Ionophore
  • Ions
  • Ir
  • Iris
  • Iris bombe
  • Iron
  • Irony
  • Irradiation
  • Irregular
  • Irreversible
  • Irreversible process
  • Irrigation
  • Irritability
  • Irritation
  • Irrumation
  • Irruption
  • Isa
  • Ischemia
  • Ischial spine
  • ISH
  • Islets Of Langerhans
  • Islets of Langerhans
  • Iso-
  • Isoclines
  • Isodynamic
  • Isoenzyme
  • Isoform
  • Isogenic
  • Isoionic point
  • Isolates
  • Isolation
  • Isomalt
  • Isomaltose
  • Isomaltulose
  • Isomer
  • Isomerase
  • Isomerism
  • Isomerization
  • Isometric
  • Isopeptide bond
  • Isopod
  • Isosmotic
  • Isotonic solution
  • Isotonicity
  • Isotope
  • Isotropic
  • Isotypes
  • Isthmus
  • Iteration
  • Iv
  • Ivc

L

  • Law of Independent Assortment
  • Home
  • Dictionary
  • Articles
  • Tutorials
  • Biology Forum
  • About Us
  • Contact Us
  • Partners
  • Editorial Guidelines

The content on this website is for information only. It is not intended to provide medical, legal, or any other professional advice. Any information here should not be considered absolutely correct, complete, and up-to-date. Views expressed here do not necessarily reflect those of Biology Online, its staff, or its partners. Before using our website, please read our Privacy Policy.

© 2001-2021 BiologyOnline. All Rights Reserved