WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
the process whereby seeds or spores sprout and begin to grow
Word Usage
"The problem with bringing comic book characters to life is that you have to make them look believable … you had to know that a believable Captain America these days would not be running around with wings sprouting from the sides of his head and would have to look a bit more militaristic."