nMerosome(Zoöl) One of the serial segments, or metameres, of which the bodies of vertebrate and articulate animals are composed.
Century Dictionary and Cyclopedia
nmerosomeIn zoöl., one of the definite successive parts or segments of which the body is composed; ametamere; a somite. Thus, one of the rays of a starfish, or one of the rings of a worm or crustacean, is a merosome.
Chambers's Twentieth Century Dictionary
nMerosomemer′ō-sōm one of the serial segments of which a body is composed, as the ring of a worm, a metamere, a somite.