Ichthyopsida n. pl. : A grand division of the Vertebrata, including the Amphibia and Fishes.

Example:


Taxonomy
Ichthyopsida, fish, free encyclopedia, vertebrates, Absence, lower vertebrates, search, 1863, lizard, animals, the mammals, the Fishes, primitive, traits, Presence, amnion, Thomas Henry Huxley, rudimentary.

Defination from the web:
Ichthyopsida. From Wikipedia, the free encyclopedia. Jump to: navigation, search. Ichthyopsida is a term coined by Thomas Henry Huxley in 1863. ... The term ichthyopsida means fish-face or fish-like as opposed to the sauropsida or lizard-face animals (reptiles and birds) and the mammals. ...