from The Century Dictionary and Cyclopedia
- n. A form assumed by an insect when radicicolous or living on roots, if different from some other form of the same insect: thus, the grape-vine pest, Phylloxera vastatrix, is most destructive in its root-form.
Sorry, no etymologies found.
We may call this long-extinct root-form and its earliest descendants (a few genera of one family) "primitive mammals" or
Only the early root-form from which both descended was common to them.
As we have already seen, this root-form developed from the primitive Proreptile stem in a totally different direction from the birds, and soon separated from the main stem of the reptiles.
This word, in its root-form of _rihwa_ (_riwa_) or _rihow_ enters largely into compounds having reference to business, law, office, news, belief, and the like.
Dental implants these days are root-form endosseous implants; i.e., they look like natural teeth and are permanent.