the gradual beginning or coming forth | introduction during embryonic development of characters or structure not present in the earlier evolutionary history of the strain or species (such as the addition of the placenta in mammalian evolution) |
vegetation that has grown | |
something grown or growing | |
(biology) the process of an individual organism growing organically; a purely biological unfolding of events involved in an organism changing gradually from a simple to a more complex level | |
a progression from simpler to more complex forms | |
a process of becoming larger or longer or more numerous or more important | |
(pathology) an abnormal proliferation of tissue (as in a tumor) | |