Meaning of natatorial

na•ta•to•ri•al

Pronunciation: (nā"tu-tôr'ē-ul, -tōr'-, nat"u-), [key]
— adj.
  1. pertaining to, adapted for, or characterized by swimming: natatorial birds.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.