The Collaborative International Dictionary of English v.0.48:

Dinosaur \Di"no*saur\, Dinosaurian \Di`no*sau"ri*an\, n. [Gr. ?
   terrible + ? lizard.] (Paleon.)
   One of the Dinosauria. [Written also deinosaur, and
   deinosaurian.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

dinosaur
    n 1: any of numerous extinct terrestrial reptiles of the
         Mesozoic era

Moby Thesaurus II by Grady Ward, 1.0:

78 Moby Thesaurus words for "dinosaur":
   alligator, ammonite, ankylosaur, archaeohippus, archaeotherium,
   archelon, arthrodiran, aurochs, bothriolepis, brachiosaur,
   brontops, brontothere, coccostean, coelodont, compsognathus,
   coryphodon, cotylosaur, creodont, crocodile, crocodilian,
   crossopterygian, cynodictis, diatryma, dimetrodon, dinichthyid,
   dinothere, diplodocus, duck-billed dinosaur, edaphosaurid,
   elasmosaur, elephant, eryopsid, eurypterid, gator, giant sloth,
   glyptodont, hadrosaur, hippo, hippopotamus, jumbo, leviathan,
   lizard, mammoth, mastodon, monster, palaeodictyopteron,
   palaeoniscid, palaeophis, palaeosaur, palaeospondylus, pelycosaur,
   phytosaur, plesiosaur, protoceratops, protylopus, pteranodon,
   pteraspid, pterichthys, pterodactyl, pterosaur, reptile, reptilian,
   saurian, sauropod, scelidosaur, smilodon, terrapin, titanosaur,
   tortoise, trachodon, triceratops, trilobite, turtle, tyrannosaur,
   uintathere, urus, whale, woolly mammoth



The Jargon File (version 4.4.7, 29 Dec 2003):

dinosaur
 n.

    1. Any hardware requiring raised flooring and special power. Used
    especially of old minis and mainframes, in contrast with newer
    microprocessor-based machines. In a famous quote from the 1998 Unix EXPO,
    Bill Joy compared the liquid-cooled mainframe in the massive IBM display
    with a grazing dinosaur ?with a truck outside pumping its bodily fluids
    through it?. IBM was not amused. Compare big iron; see also mainframe.

    2. [IBM] A very conservative user; a zipperhead.


The Free On-line Dictionary of Computing (30 December 2018):

dinosaur

   1. Any hardware requiring raised flooring and special power.
   Used especially of old minicomputers and mainframes, in
   contrast with newer microprocessor-based machines.

   In a famous quote from the 1988 Unix EXPO, Bill Joy compared
   the liquid-cooled mainframe in the massive IBM display with
   a grazing dinosaur "with a truck outside pumping its bodily
   fluids through it".  IBM was not amused.

   Compare big iron; see also dinosaurs mating.

   2. [IBM] A very conservative user; a zipperhead.

   [Jargon File]


U.S. Gazetteer Places (2000):

Dinosaur, CO -- U.S. town in Colorado
   Population (2000):    319
   Housing Units (2000): 156
   Land area (2000):     0.795669 sq. miles (2.060772 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.795669 sq. miles (2.060772 sq. km)
   FIPS code:            20495
   Located within:       Colorado (CO), FIPS 08
   Location:             40.241560 N, 109.008747 W
   ZIP Codes (1990):     81610
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Dinosaur, CO
    Dinosaur