hop or HOP
n 1 : a twining vine (Humulus lupulus) of the mulberry family with 3-lobed or 5-lobed leaves and inconspicuous flowers of which the pistillate ones are in glandular cone-shaped catkins 2 hops pl : the ripe dried pistillate catkins of a hop used esp. to impart a bitter flavor to malt liquors and also in medicine as a tonic .
abbr high oxygen pressure .
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