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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.
[New Latin lupulus, specific epithet of the hop plant (from diminutive of Latin lupus, wild hop plant, from lupus, wolf (the hop plant perhaps being so called because of its biting bitterness or the resemblance of its bracts to teeth) ; see lupine2) + -in.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(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]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014