The story
From (tri)chl(oro) + (hydr)ox(y) + estradiol. By surface analysis, clox- + estradiol.
Etymology from Wiktionary, CC BY-SA 4.0.
cloxestradiol
Today it means: A synthetic steroidal estrogen, an analogue of estradiol with a 2,2,2-trichloroethoxy substitution. Full definition →