Medical Definition of develop
1a: to make active or promote the growth of <developed their muscles by weight lifting>b: to cause to grow and differentiate along lines natural to its kind <the zygote is gradually developed into the adult plant or animal>
2: to become infected or affected by <developed pneumonia>
intransitive verb: to go through a process of natural growth, differentiation, or evolution by successive stages <the fever develops normally> <the embryo develops into a well-formed human being>
2: to acquire secondary sex characteristics <she is developing rapidly for a girl of 12>
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