HOURGLASS
hourglass
(noun) a sandglass that runs for sixty minutes
Source: WordNet® 3.1
Etymology
Noun
hourglass (plural hourglasses)
A clock made of two glass vessels connected by a narrow passage through which sand flows.
(GUI) A pointer, often shaped like an hourglass, indicating that the computer is busy.
Synonyms
• sandglass
Hyponyms
• egg timer, egg-timer
Source: Wiktionary
Hour"glass`, n.
Definition: 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.
Note: A similar instrument measuring any other interval of time takes
its name from the interval measured; as, a half-hour glass, a half-
minute glass. A three-minute glass is sometimes called an egg-glass,
from being used to time the boiling of eggs.
Source: Webster’s Unabridged Dictionary 1913 Edition