thirty

prose

acidity

sankyoku, a traditional Japanese ensemble consisting of three instruments: shakuhachi, shamisen, and koto (formerly kokyu, shamisen, and koto)

(uncommon) tripod

the three types of arms made out of leather: armor, helmet, and shield / in traditional Japanese cosmology, a general term for the three years that often accompanied change: kakumei, kakuun, and kakurei

coral

(chemistry) oxide (binary compound of oxygen)

third rank / of person of the third rank / a low ranking priest / a Christian doctrine in which the Father, Son, and Holy Spirit are one; the trinity

Kyūjitai form of 共産: communism