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Webster 1913 Edition

Noun.

[Cf. F.

lupulin

. See

(Chem.)

A bitter principle extracted from hops.

The fine yellow resinous powder found upon the strobiles or fruit of hops, and containing this bitter principle.

[Written also

lupuline

Noun.

[L. lupulus, hops.] The fine yellow powder of hops.

lupulin ‎(plural lupulins)