Sentence:  When it comes to rate of early <WSD>growth</WSD> , the Indian python leads with a figure of about 3 feet 6 inches per year for the first two years , more or less . 
Meaning of the word marked with <WSD> tags:  (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