Plesiomorphism | definition of plesiomorphism by Medical dictionary
Similarity in form.
[plesio- + G. morphē, form]
plesiomorphism (plē″sē-ō-mor′fĭzm) [Gr. plesios, close, + morphe, form, + -ismos, condition]
Similarity of form.
References in periodicals archive
Outgroup method: a method of indirect comparison that use the information in the outgroup in order to establish in the character under investigation the condition of plesiomorphism
or apomorphism in the ingroup.