lupulin noun.
['lu:pjʊlɪn] E19.[from mod. Latin use as specific epithet (see below) of Latin lupulus a plant mentioned by Pliny (perh. wild hops): see -IN1.]A fine yellowish powder found under the scales of the calyx of the hop,
Humulus lupulus; the bitter principle contained in this.
■ lupu'linic adjective M19. [TahlilGaran] English Dictionary ▲