plural of chicken or egg question

(idiomatic, sports, transitive) To connect with.

A mineral that contains one or more rare earth elements as major metal constituents.

plural of butterfly effect

(aviation) An aerobatic maneuver consisting of 1/4 looping up, wingover (left or right), 1/2 looping down+up, wingover (right or left), 1/4 looping down. / The symbol ∞ or anything of the same shape.

A chess opening in which white begins by playing 1.c4, moving his queen bishop's pawn to the fourth rank.

Alternative form of fraternal birth order effect

plural of egg timer

A field of engineering concerned with municipal infrastructure, including streets, water supply, sewers, electricity distribution, solid waste management and public parks.

Alternative form of fag-end