Hop n. 1.(Bot.) A climbing plant (Humulus Lupulus), having a long, twining, annual stalk. It is cultivated for its fruit (hops).
2.The catkin or strobilaceous fruit of the hop, much used in brewing to give a bitter taste.
3.The fruit of the dog-rose. See Hip. Hop back. (Brewing) See under 1st Back. Hop clover (Bot.), a species of yellow clover having heads like hops in miniature (Trifolium agrarium, and Trifolium procumbens).
Hop flea (Zool.), a small flea beetle (Haltica concinna), very injurious to hops.
Hop fly (Zool.), an aphid (Phorodon humuli), very injurious to hop vines.
Hop froth fly (Zool.), an hemipterous insect (Aphrophora interrupta), allied to the cockoo spits. It often does great damage to hop vines.
Hop hornbeam (Bot.), an American tree of the genus Ostrya (Ostrya Virginica) the American ironwood; also, a European species (Ostrya vulgaris).
Hop moth (Zool.), a moth (Hypena humuli), which in the larval state is very injurious to hop vines.
Hop picker, one who picks hops.
Hop pole, a pole used to support hop vines.
Hop tree (Bot.), a small American tree (Ptelia trifoliata), having broad, flattened fruit in large clusters, sometimes used as a substitute for hops.
Hop vine (Bot.), the climbing vine or stalk of the hop.
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