(aviation, travel) (in a reservation system) The letter used to signify a particular fare level.

(martial arts) A division of competition used to match competitors against others of their own weight

A species of clam, quahog, Mercenaria mercenaria.

(astronomy) Abbreviation of Cosmology Large Angular Scale Surveyor. / (astronomy) Abbreviation of Cosmology Large Angular Scale Survey.

marriage with others of the same clan

(transitive) To immobilize (a vehicle) with a wheel clamp.

(rowing) Acronym of Clip-on Load Adjusting Mechanism. A device that can be fitted onto an oar to adjust set.

(linguistics) A linguistic form class whose members are words.

(US, colloquial) An introductory university course that is designed to "weed out" those students who are not able to pass it.

(algebra) A subset of a group which is an equivalence class in the quotient set of the group divided by conjugation as equivalence relation.