Search Result for "hourglass": 
Wordnet 3.0

NOUN (1)

1. a sandglass that runs for sixty minutes;

The Collaborative International Dictionary of English v.0.48:

Hourglass \Hour"glass`\, n. 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. [1913 Webster] 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. [1913 Webster]
WordNet (r) 3.0 (2006):

hourglass n 1: a sandglass that runs for sixty minutes
Moby Thesaurus II by Grady Ward, 1.0:

39 Moby Thesaurus words for "hourglass": abbreviation, astriction, astringency, bottleneck, cervix, circumscription, coarctation, compactedness, compaction, compression, compressure, concentration, condensation, consolidation, constriction, constringency, contraction, contracture, curtailment, decrease, diminuendo, hourglass figure, isthmus, knitting, narrow place, narrowing, neck, puckering, pursing, reduction, shortening, solidification, stranglement, strangulation, striction, stricture, systole, wasp waist, wrinkling