See also: hca English Noun HCA (countable and uncountable, plural HCAs) (countable) Initialism of home care assistant. (organic chemistry) Initialism of hydroxycitric acid. Anagrams -cha, ACH, CAH, CHA, Cha, HAC, ach, cah, chaWikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads