ammonite1 |
any of various coiled, flat, chambered fossil shells of extinct cephalopod mollusks from the Mesozoic era. |
ape-man |
an extinct primate representing the transitional point in evolution between apes and modern man. (Cf. missing link.) |
aurochs |
an extinct wild ox once common in northern Africa, Europe, and western Asia, and probably an ancestor of domestic cattle. [2 definitions] |
Australopithecine |
a tool-making primate of an extinct genus of hominids that inhabited eastern and southern Africa. |
Aztec |
the extinct language of this people. [1/4 definitions] |
coelacanth |
a large bony fish that was thought to be extinct until a living specimen was found in 1938. |
Coptic |
the Afro-Asiatic language of ancient Egypt now extinct except for ritual use in the Coptic Church. [1/3 definitions] |
defunct |
no longer in existence or use; dead; extinct. |
die out |
to become extinct. [1/2 definitions] |
dinosaur |
one of various extinct reptiles that lived approximately 100 million years ago and included the largest land creatures. [1/2 definitions] |
dodo |
any of several large, clumsy, flightless birds formerly found on islands in the Indian Ocean but now extinct. [1/2 definitions] |
endangered species |
a species of plant or animal that is in danger of becoming extinct. |
Etruscan |
the now extinct language of this country. [1/3 definitions] |
extant |
still in existence; current; not extinct, destroyed, or lost. |
extinction |
the act or process of becoming or making extinct, or of being ended or putting an end to. [1/2 definitions] |
ganoid |
belonging to a group of fishes, some extinct, that have hard armorlike scales. [1/2 definitions] |
great auk |
a large flightless North Atlantic auk that became extinct in the mid-nineteenth century. |
Homo erectus |
an extinct species of the human race that had a fairly small brain and an upright stance. (See Pithecanthropus.) |
ichthyosaur |
any of an extinct variety of marine reptiles that had four flippers, a dolphinlike head, and a vertical caudal fin, and that ranged in length from four to forty feet. |
longhorn |
one of a breed of beef cattle with long horns that was once common in the southwestern United States and is now nearly extinct. |
mammoth |
a very large extinct mammal related to and resembling the elephant, that lived in the Northern Hemisphere. [1/2 definitions] |