The Collaborative International Dictionary
Acaroid
Acaroid \Ac"a*roid\, a. [NL., acarus a mite + -oid.] (Zo["o]l.) Shaped like or resembling a mite. [1913 Webster] adj.
1. (botany) having no carpels
Wiktionary
acaroid
a. (context biology zoology English) Shaped like or resembling a mite.