HOURGLASS
\ˈa͡ʊ͡əɡlas], \ˈaʊəɡlas], \ˈaʊə_ɡ_l_a_s]\
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An instrument for measuring time, especially the interval of an hour. It consists of a glass vessel having two compartments, from the uppermost of which a quantity of sand, water, or mercury occupies an hour in running through a small aperture unto the lower.
By Oddity Software
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An instrument for measuring time, especially the interval of an hour. It consists of a glass vessel having two compartments, from the uppermost of which a quantity of sand, water, or mercury occupies an hour in running through a small aperture unto the lower.
By Noah Webster.
By William Dodge Lewis, Edgar Arthur Singer
By James Champlin Fernald
Word of the day
Dopamine Acetyltransferase
- An enzyme that catalyzes the of groups from acetyl-CoA to arylamines. They have wide specificity for aromatic amines, particularly serotonin, and can also catalyze acetyl transfer between arylamines without CoA. EC 2.3.1.5.