having three wheels

(historical) The tripartite division of China between the states of Wei (魏 (Wèi)), Shu (蜀 (Shǔ)), and Wu (吳／吴 (Wú)), during AD 220–280, following the Han dynasty and preceding the Jin dynasty.

plural of three-space

(religion, Wicca) A religious tenet held by some Wiccans, stating that whatever energy, positive or negative, a person puts into the world will be returned threefold.

plural of number three

(cricket) The batsman who bats third. / (theater) A small town where theatrical performances are unlikely to meet with much success.

(mathematics education) A rule stating that, if two ratios are equal, then the denominator of the second equals its numerator times the reciprocal of the first ratio: if a/b=c/d then d=(bc)/a.

(obsolete) The finest and most costly kind of velvet, with a fine, thick pile.

Having a cross section in the form of an equilateral triangle; said especially of a kind of file.

(amateur radio, CB) Best wishes; regards.