Dictionary > Zenith

Zenith

Zenith
1. That point in the visible celestial hemisphere which is vertical to the spectator; the point of the heavens directly overhead; opposed to nadir. From morn To noon he fell, from noon to dewy eve, A summer’s day; and with the setting sun Dropped from the zenith, like a falling star. (milton)
2. Hence, figuratively, the point of culmination; the greatest height; the height of success or prosperity. I find my zenith doth depend upon A most auspicious star. (Shak) This dead of midnight is the noon of thought, And wisdom mounts her zenith with the stars. (Mrs. Barbauld) It was during those civil troubles . . . This aspiring family reached the zenith. (Macaulay) zenith distance.
(Science: astronomy) A telescope specially designed for determining the latitude by means of any two stars which pass the meridian about the same time, and at nearly equal distances from the zenith, but on opposite sides of it. It turns both on a vertical and a horizontal axis, is provided with a graduated vertical semicircle, and a level for setting it to a given zenith distance, and with a micrometer for measuring the difference of the zenith distances of the two stars.
Origin: oe. Senyth, OF. Cenith, f. Zenith, sp. Zenit, cenit, abbrev. Fr. Ar. Samt-urras way of the head, vertical place; samt way, pathal the – ras head. Cf. Azimuth.


You will also like...

kinesin motor proteins transporting molecules across microtubules
Movement of Molecules Across Cell Membranes

Molecules move within the cell or from one cell to another through different strategies. Transport may be in the form of..

Homeostatic Mechanisms and Cellular Communication
Homeostatic Mechanisms and Cellular Communication

Homeostasis is the relatively stable conditions of the internal environment that result from compensatory regulatory res..

Still Water Community Plants
Still Water Community Plants

This tutorial looks at the adaptations of freshwater plants for them to thrive in still water habitats. Familiarize your..

Pink Lotus plant on a pond
Freshwater Lentic Communities & Animals

This tutorial looks at some of the communities in freshwater lentic habitats. For instance, symbiosis occurs in a commun..

Lotic community of algal species
Lotic Communities & Algae

Lotic communities have conditions that are rather harsh for typical plants. Thus, the diversity of plant species in loti..

complete-dominance
Dominance

This tutorial presents Gregor Mendel's law of dominance. Learn more about this form of inheritance and how it can be pre..