antimere

noun Zoology.

1. a segment or division of the body having a corresponding segment or division that is opposite to it relative to the longitudinal axis of the body.
2. a similar part in a radially symmetrical animal.

noun

1. a part or organ of a bilaterally or radially symmetrical organism that corresponds to a similar structure on the other side of the axis, such as the right or left limb of a four-legged animalAlso called: actinomere

n.

1. A segment of an animal body formed by planes cutting the axis of the body at right angles.
2. One of the corresponding parts of a bilaterally symmetrical organism.
3. The right or left half of the body.