counter for number of kinds or types

an origin, cause / a type, class / an interest, appeal

a female given name / a surname

an origin, cause / a type, class

(organic chemistry) hippurate

(organic chemistry, biochemistry) pyruvic acid

one day

organic chemistry

(chemistry) organic solvent

one, 1 / the first in order, foremost / the beginning / the best / a kind of; one of something / (card games) an ace / unity / the bottom string of a shamisen or other Japanese musical instrument