Physograde
Phys´o`grade
n. | 1. | (Zool.) Any siphonophore which has an air sac for a float, as the Physalia. |
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
n. | 1. | (Zool.) Any siphonophore which has an air sac for a float, as the Physalia. |