(physics) A quark having a fractional electric charge of +2/3 and a mass of about 1150 to 1350 MeV. / Symbol: c

(physics) A quark having a fractional electric charge of -1/3 and a mass of about 4 to 8 MeV. / Symbol: d

(physics) A quark having a fractional electric charge of +2/3 and a mass of about 1.5 to 4 MeV. / Symbol: u

(physics) A quark having a fractional electric charge of -1/3 and a mass of about 80 to 130 MeV. / Symbol: s

A person who calculates the cost of materials and labour on a construction project based on an architect's plans.

Time spent enjoyably with family, friends, or one's partner. / Time spent by working parents with their children, especially time given over to productive or creative attention.

A small off-road four-wheeled powered vehicle, especially of a design derived from a motorcycle, usually used for recreation or farm work.

(physics) A branch of theoretical physics aiming to unite quantum mechanics with general relativity. / (quantum mechanics) The gravitational force modeled as a quantum field.

(basketball) The achievement of a two-digit number of any four of points scored, assists, rebounds, blocks, or steals in a single game.

plural of qualification