noun
: a theory of the origin of the sporophyte of vascular plants that proposes that the plant body has been differentiated from a primeval axis or stem — compare protocorm theory
noun
: a theory of the origin of the sporophyte of vascular plants that proposes that the plant body has been differentiated from a primeval axis or stem — compare protocorm theory
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012