transitive verb specialized -·ized′, specializing -·iz′·ing

1. to make special, specific, or particular; specify
2. to direct toward or concentrate on a specific end
3. Biol. to adapt (parts or organs) to a special condition, use, or requirement

Etymology: Fr spécialiser

intransitive verb

1. to make a special study of something or work only in one part or branch of a subject, profession, etc. to specialize in medieval history
2. Biol. to become adapted to meet a special condition, use, etc.