I. noun
Etymology: by folk etymology from redground, from Middle English red-gownd, from read, reed, red red + gound, gownd pus, from Old English gund — more at red , groundsel
: strophulus
II. noun
Etymology: red (I) + gum
1.
a.
(1) : any of several Australian trees of the genus Eucalyptus (especially E. camaldulensis, E. amygdalina, and E. calophylla )
(2) : the timber of one of these trees
b. : eucalyptus gum
c. : red acaroid resin
2. : sweet gum 1