(organic chemistry) Initialism of hydrocarbonate. / (organic chemistry, refrigeration) Initialism of hydrocarbon., a class of molecules containing hydrogen and carbon atoms

(fandom slang) Alternative letter-case form of hc

plural of HC

(fandom slang) Alternative letter-case form of HC

(fandom slang) Initialism of headcanon.

(electronics) Acronym of high-speed clock.

Initialism of Health Care and Life Sciences Interest Group.

(chemistry) A chemical engineering component that removes hydrochloric acid from a product such as a chlorinated hydrocarbon by treatment with a base

(astronomy) Initialism of Harvard College Observatory.

Initialism of hearing carryover., a service or device that allows speech-disabled users with hearing to listen to the person they are calling.