rosinweed

[roz-in-weed]

noun

any coarse, North American, composite plant of the genus Silphium, having a resinous juice and stalkless, paired leaves.
the compass plant, S. laciniatum.

Origin of rosinweed

An Americanism dating back to 1825–35; rosin + weed¹

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for rosinweed

rosinweed

noun

any of several North American plants of the genus Silphium and related genera, esp the compass plant, having resinous juice, sticky foliage, and a strong smell: family Asteraceae (composites)

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012