hourglass
Longman Dictionary of Contemporary English 5++LDOCE 5++hour·glass /ˈaʊəɡlɑːs $ ˈaʊrɡlæs/ noun [countable] 1. 
TMCa glass container for measuring time in which sand moves slowly from the top half to the bottom in exactly one hour 〔计时用的〕沙漏 → egg-timer2. hourglass figure DCBa woman who has an hourglass figure has a narrow waist in comparison with her chest and hips 〔女性的〕沙漏体型，蜂腰体型
TMCa glass container for measuring time in which sand moves slowly from the top half to the bottom in exactly one hour 〔计时用的〕沙漏 → egg-timer2. hourglass figure DCBa woman who has an hourglass figure has a narrow waist in comparison with her chest and hips 〔女性的〕沙漏体型，蜂腰体型Examples from the Corpus
hourglass• Like sand in an hourglass, simultaneously pulled in both directions by the mysterious appetite of a two-headed gravity.• I picture the evolution of human consciousness in the shape of an hourglass.• The sand has run out of the hourglass.hour·glass nounChineseSyllable
glass which Corpus in container measuring time sand a for
hourglass
hour‧glass /ˈaʊəɡlɑːs $ ˈaʊrɡlæs/
noun [countable]
1. a glass container for measuring time in which sand moves slowly from the top half to the bottom in exactly one hour ⇨ egg-timer
2. hourglass figure a woman who has an hourglass figure has a narrow waist in comparison with her chest and hips
hour‧glass /ˈaʊəɡlɑːs $ ˈaʊrɡlæs/
noun [countable]1. a glass container for measuring time in which sand moves slowly from the top half to the bottom in exactly one hour ⇨ egg-timer
2. hourglass figure a woman who has an hourglass figure has a narrow waist in comparison with her chest and hips