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.


 Humulus lupulus
      n : European twining plant whose flowers are used chiefly to
          flavor malt liquors; cultivated in America [syn: {common
          hop, common hops, bine, European hop]