(biochemistry) a chain of amino acids, linked by peptide bonds, that forms the 'backbone' of proteins

(molecular biology) A technique in molecular biology for creating multiple copies of DNA from a sample; used in genetic fingerprinting etc.

(uncountable) Small pieces of paper punched out from the edges of continuous stationery, or from ballot papers, paper tape, punched cards, etc. / (countable) One of these pieces of paper.

(West Country, obsolete) I had

(Internet slang, seduction community, incel slang) Alternative spelling of Chad (“alpha-male; a virile man”)

(idiomatic) To risk doing something; to try something risky.

(US) Synonym of chaise longue

An open, horse-drawn carriage for one or two people, usually with one horse and two wheels. / A chaise longue. / A post chaise.

(historical) An enclosed horse-drawn carriage with four wheels, used to transport mail and passengers.

(baseball) The best-of-seven series of games to determine the winner of each of the National League and the American League.