Endocrinology It All Starts with Word Building Medical language is all about medical words and their word parts. Jump right into this chapter by learning some of the common combining forms and their definitions that you will encounter in the chapter. acr/oaden/oadrenal/oandr/oantagon/ocalc/ocortic/odiabet/oestr/aestr/ogenit/ogigant/oglandul/ogluc/oglyc/oglycos/ogonad/ohome/ohormon/ohypophys/oinhibit/oinsulin/omelan/omineral/onod/oovari/opancreat/opituitar/opituit/orecept/osecret/osomat/ostimul/otesticul/otest/othyr/othym/othyroid/otrop/o- extremity; highest point gland adrenal gland male oppose or work against calcium cortex (outer region) diabetes female female genitalia giant gland glucose (sugar) glucose (sugar) glucose (sugar) gonads (ovaries and testes) same hormone pituitary gland block; hold back insulin black mineral; electrolyte node (knob of tissue) ovary pancreas pituitary gland pituitary gland receive produce; secrete body exciting; strengthening testis; testicle testis; testicle shield-shaped structure (thyroid gland) thymus thyroid gland having an affinity for; stimulating; turning