actino- combining form ['aktɪnǝʊ, ak'tɪnǝʊ] of Greek aktin-, aktis ray: see -O-.

■ ,actino'morphic adjective (Botany) (of a flower) characterized by radial symmetry (opp.

■ zygomorphic) L19.

■ ,actino'mycin noun an antibiotic obtained from actinomycetes M20.

■ ,actinomy'cosis noun a disease of animals (esp. cattle), and sometimes of people, caused by infection with actinomycetes and most commonly affecting the mouth, jaw, or neck L19.

■ ,actinomy'cotic adjective pertaining to or suffering from actinomycosis E20.

■ ,actinopte'rygian adjective & noun [Greek pterugion fin, dim. of pterux wing] (designating or pertaining to) a ray-finned fish, a fish belonging to the subclass Actinopterygii, which includes most living bony fishes L19.

■ ,actino'therapy noun treatment of disease by means of ultraviolet radiation E20.

■ ,actino-u'ranium noun the uranium isotope of mass 235 E20.

[TahlilGaran] English Dictionary ▲