Meanings

Tetrapoda

tetrapod

fourth ventricle

abomasum (fourth compartment of the stomach of a ruminant)

rolling a two and four (with two dice)

Père David's deer (Elaphurus davidianus)

titanium tetrachloride

Russian tortoise (Agrionemys horsfieldii)

four concealed triplets (yakuman)

four sides (boundaries) of a property

big four winds

little four winds

quatrain

amateur

tate-shiho-gatame (judo)

Sichuan (China)

the four great civilizations of the world (China, Babylon, India and Egypt; as put forward by Chinese scholar Liang Qichao in 1900)

the four beginnings (in Mencius's belief in humanity's innate goodness)

four-on-the-floor

four large domesticated fishes (black carp, grass carp, bighead carp, and silver carp)