Ichthyosaurus

Ichthyosaurus (lit. a fish-reptile), an extinct marine reptile in the shape of a fish, its limbs paddles, and with a long lizard-like tail.

Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)

Ichor * Iconium
Ibrahim Bey
Ibrahim Pasha
Ibsen, Henrik
Ibycus
Icarus
Ice blink
Iceland
Ich dien
Ichneumon
Ichor
Ichthyosaurus
Iconium
Iconoclasts
Ictinus
Ida
Idaho
Iddesleigh, Earl Of
Idealism
Ideler, Christian Ludwig
Identical Note
Ides