Hop back. (Brewing) See under 1st Back. -- Hop clover (Bot.), a species
of yellow clover having heads like hops in miniature (Trifolium
agrarium, and T. procumbens). -- Hop flea (Zoˆl.), a small flea beetle
(Haltica concinna), very injurious to hops. -- Hop fly (Zoˆl.), an
aphid (Phorodon humuli), very injurious to hop vines. -- Hop froth fly
(Zoˆl.), 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 (O. Virginica) the
American ironwood; also, a European species (O. vulgaris). -- Hop moth
(Zoˆl.), 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.
Hop, v. t. To impregnate with hops. Mortimer.