chem- combining form orchemo-orchemico-alsochemi-orchemio- Etymology:chem- & chemo- from New Latin, from Late Greek chēmeia alchemy; chemico- from chemical; chemi- & chemio- probably from Danish kemi-, from kemi chemistry, from Late Greek chēmeia — more at alchemy 1.: chemical : chemistry < chemosmosis > < chemotaxis > 2.: chemically < chemisorb > < chemiotropic > : chemical and < chemicophysical >