thy·ro·trophic \|thīrə.|träfik, -trōf-\adjective orthy·ro·trop·ic\-|träp-\ Etymology:thyr- + -trophic or -tropic : exerting or characterized by a direct influence on the secretory activity of the thyroid gland < the thyrotrophic hormone of the anterior pituitary > < thyrotrophic functions > • thy·ro·trophi·cal·ly\-fə̇k(ə)lē\adverb