Definify.com
Webster 1913 Edition
Rosinweed
Ros′in-weedˊ
,Noun.
 (Bot.) 
(a) 
The compass plant. See under 
Compass
. (b) 
A name given in California to various composite plants which secrete resins or have a resinous smell. 
Definition 2025
rosinweed
rosinweed
English
Noun
rosinweed (plural rosinweeds)
- The compass plant.
 - (US, California) Any of various composite plants which secrete resins or have a resinous smell.