Also found in: Thesaurus, Medical, Encyclopedia, Wikipedia.
Related to lupulin: hops
A yellowish-brown substance obtained from glands at the base of the strobili of the hop plant, containing essential oils and formerly used in medicine as a sedative.
(Pharmacology) a resinous powder extracted from the female flowers of the hop plant and used as a sedative
[C19: from New Latin lupulus, diminutive of lupus the hop plant]