What is "homotype"

Homotype \Hom"o*type\, n. [Homo- + -type.] (Biol.) That which has the same fundamental type of structure with something else; thus, the right arm is the homotype of the right leg; one arm is the homotype of the other, etc.
--Owen.

n. (context biology English) That which has the same fundamental type of structure with something else.