Meanings

tetrapod

Yokkaichi asthma

the four major pollution-caused illnesses (Minamata disease, Niigata Minamata disease, Yokkaichi asthma, Itai-itai disease)

the four gentlemen (plum, chrysanthemum, orchid, and bamboo)

quadrant (instrument)

four grave prohibitions (killing, theft, adultery, and deceit)

ethylenediaminetetraacetic acid

yoko-shiho-gatame (judo hold in which the opponent's shoulders and hips are pinned)

tetralogy of Fallot

winged bean (Psophocarpus tetragonolobus)

quadruped

consul

head, trunk, arms, and legs

falling ill (esp. of a monk)

fractional sampling

Tetragonocalamus quadrangularis (type of bamboo)

quadrennial

four-legged

April Theses

the four auspicious beasts from Chinese mythology