29 results found

Search Results for: aperture

Back aperture

Back aperture (Science: microscopy) The exit pupil of a microscope objective lens. The objective lens back aperture, which... Read More

Numerical aperture

numerical aperture For a lens the resolving power depends upon the wavelength of light being used and inversely upon the... Read More

Angular aperture

Angular aperture The angle, in air, of light that passes from the object to the ends of the diameter of the front lens of... Read More

Aperture

Aperture (Science: physics) The opening in an optical system which restricts the size of the bundle of rays incident on a... Read More

Angular

Angular 1. Relating to an angle or to angles; having an angle or angles; forming an angle or corner; sharp-cornered;... Read More

Slide

slide 1. The act of sliding; as, a slide on the ice. 2. Smooth, even passage or progress. A better slide into their... Read More

Apertura thoracis superior

Apertura thoracis superior --> superior thoracic aperture The upper boundary of the bony thorax composed of the first... Read More

Pupillary light reflex

Definition noun, plural: pupillary light reflexes A reflex marked by the constriction of the pupil in response to the... Read More

External os

Definition noun A small, somewhat circular aperture on the extremity of the extocervix Supplement At the lower part of the... Read More

Apertura mediana ventriculi quarti

Apertura mediana ventriculi quarti median aperture of fourth ventricle: a deficiency in the lower portion of the roof of the... Read More

Lamellae

Definition noun, singular: lamella (general) Thin structures resembling a plate. (cell biology) Intergrana thylakoids, i.e.... Read More

Labium

Labium Origin: L. 1. A lip, or liplike organ. 2. The lip of an organ pipe. 3. (Science: anatomy) The folds of integument at... Read More

Costal arch

Costal arch That portion of the inferior aperture of the thorax formed by the articulated cartilages of the seventh to tenth... Read More

Pelvic inlet

pelvic inlet --> superior pelvic aperture The upper opening of the true pelvis, bounded anteriorly by the pubic symphysis... Read More

Depth of field

Depth of field (Science: microscopy) The depth or thickness of the object space that is simultaneously in acceptable... Read More

Airy disk

Airy disk (Science: microscopy) The image of a bright point object as focused by a lens system. With monochromatic light, it... Read More

Foramen

Definition noun, plural: foramina, foramens Any opening or perforation, orifice or fenestra, especially through a bone, and... Read More

Fauces

Fauces 1. (Science: anatomy) The narrow passage from the mouth to the pharynx, situated between the soft palate and the base... Read More

Function

Definition noun, plural: functions (biology) The special, normal, proper physiologic activity of a body part or an... Read More

Pupil

pupil 1. A youth or scholar of either sex under the care of an instructor or tutor. Too far in years to be a pupil now.... Read More

Stigma

stigma The pollen-receptive surface of a carpel or group of fused carpels, usually sticky. The apical end of the style where... Read More

Lip

Lip 1. One of the two fleshy folds which surround the orifice of the mouth in man and many other animals. In man the lips... Read More

Orifice

Definition noun, plural: orifices An opening or aperture; any external opening in the body of an animal. Supplement In a... Read More

Coverslip

Coverslip (Science: microscopy) thin glass, plastic, sapphire, SiO, NaCl, etc. Shaped into circles, squares, or rectangles... Read More

Vent

vent To snuff; to breathe or puff out; to snort. Origin: Cf. F. Venter to blow, vent wind (see Ventilate); but prob... Read More

Holes

Hole 1. A hollow place or cavity; an excavation; a pit; an opening in or through a solid body, a fabric, etc.; a... Read More

Hole

Hole 1. A hollow place or cavity; an excavation; a pit; an opening in or through a solid body, a fabric, etc.; a... Read More

Breach

Breach Origin: oe. Breke, breche, as. Brice, gebrice, gebrece (in comp), fr. Brecan to break; akin to dan. Braek, MHG.... Read More

Fruits, Flowers, and Seeds

Flowering plants grow in a wide variety of habitats and environments. They can go from germination of a seed to a mature... Read More