(mineralogy) A monoclinic-prismatic dark brown mineral containing aluminum, calcium, chromium, hydrogen, iron, magnesium, oxygen, and silicon.

(countable) The state of being polyvalent. / (countable) Congruence with polyvalency. / (uncountable, music) A quality of music that is played in more than one harmonic function in the same key.

(law) The act of granting a naked license.

A disease of horses caused by an infection by the bacterium Streptococcus equi.