noun Zoology.
- 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.
- a similar part in a radially symmetrical animal.
noun
- 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.
- A segment of an animal body formed by planes cutting the axis of the body at right angles.
- One of the corresponding parts of a bilaterally symmetrical organism.
- The right or left half of the body.