The Collaborative International Dictionary of English v.0.48:
Rape \Rape\, n. [L. rapa, rapum, akin to Gr. "ra`pys, "ra`fys,
G. r["u]be.] (Bot.)
A name given to a variety or to varieties of a plant of the
turnip kind, grown for seeds and herbage. The seeds are used
for the production of rape oil, and to a limited extent for
the food of cage birds.
Note: These plants, with the edible turnip, have been
variously named, but are all now believed to be derived
from the Brassica campestris of Europe, which by some
is not considered distinct from the wild stock
(Brassica oleracea) of the cabbage. See Cole.
Broom rape. (Bot.) See Broom rape, in the Vocabulary.
Rape cake, the refuse remaining after the oil has been
expressed from the rape seed.
Rape root. Same as Rape.
Summer rape. (Bot.) See Colza.