Sentence:  There is some evidence that naturally occurring goitrogens may play a role in the <WSD>development</WSD> of goitre , particularly in Tasmania and Australia ( Clements and Wishart , 1956 ) . 
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