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tropic of Cancer
tropic of Capricorn
tropical
tropical cyclone
tropical fish
tropical product
tropical storm
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trophoblast
tro·pho·blast [ trṓfə blàst, tróffə blàst ] (plural tro·pho·blasts)


noun 
Definition:
 
embryo's outer layer: a thin outer layer ectoderm that encloses the embryo of mammals, attaches the fertilized ovum to the wall of the womb, and absorbs nutrients

tro·pho·blas·tic [ trfə blástik, tròffə blástik ] adjective
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