from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun Astronomy A point on the celestial sphere directly below the observer, diametrically opposite the zenith.
- noun The lowest point.
from The Century Dictionary.
- noun That point of the heavens which is vertically below any station upon the earth.
- noun Hence The lowest point; the point of extreme depression.
from the GNU version of the Collaborative International Dictionary of English.
- noun That point of the heavens, or lower hemisphere, directly opposite the zenith; the inferior pole of the horizon; the point of the celestial sphere directly under the place where we stand.
- noun The lowest point; the time of greatest depression.
- noun (Astron.) the axis of the conical shadow projected by the earth.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun The point of the
celestial sphere, directly opposite the zenith; inferior pole of the horizon; point of the celestial sphere directly under the place where we stand.
- noun figuratively The lowest point; time of greatest depression.
- noun astronomy The axis of a projected conical shadow; the direction of the force of gravity at a location;
- noun beekeeping, archaic An empty box added beneath a full one in a
beehiveto give the colony more room to expand or store honey.
- verb transitive, beekeeping To
extend(a beehive) by adding an empty box at the base.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun the point below the observer that is directly opposite the zenith on the imaginary sphere against which celestial bodies appear to be projected
- noun an extreme state of adversity; the lowest point of anything
from The American Heritage® Dictionary of the English Language, 4th Edition
[Middle English, from Medieval Latin, from Arabic naẓīr (as-samt), opposite (the zenith), from naẓara, to see, watch; see nṭr in Semitic roots.]
from Wiktionary, Creative Commons Attribution/Share-Alike License
From Medieval Latin nadir, from Arabic نَظِيرُ السَّمْت (naẓīru as-samt), composed of السَمْتُ (as-samt, "the zenith") and نَظِير (naẓīr, "counterpart, corresponding to").
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