(Australia, US, colloquial) Casual.

(chemistry) Initialism of Chemical Abstracts Service. / (law, sports) Abbreviation of Court of Arbitration for Sport.

(electronics, communication) Initialism of channel-associated signalling.

(law) Abbreviation of casualty.

(genetics) Acronym of CRISPR-associated.

Ellipsis of Cas gene. / Ellipsis of Cas protein. / Ellipsis of Cas sequence.

Informal abbreviation for casual

plural of CA

Alternative spelling of ca.

Abbreviation of circa.