dinomaniacn.
/ˌdʌɪnə(ʊ)ˈmeɪnɪak/, U.S. /ˌdaɪnoʊˈmeɪniˌæk/ rare.
A person who is enthusiastic or extremely passionate about dinosaurs.
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the world > animals > reptiles > extinct reptiles and dinosaurs > [noun] > Sauria > saurian or dinosaur > mania for > person
dinomaniac1988
1988 PR Newswire (Nexis) 8 Feb. With ‘Dinosaurs Alive’, dinomaniacs in every age group also can see some of their favorite prehistoric creatures ‘in the flesh’, thanks to the collaboration of modern technology with the science of paleontology.
1991 New Scientist 30 Nov. 50/4 Illustrations [of dinosaurs] are of a good standard... Dinomaniacs can have fun trying to identify the various sources of inspiration.
This entry has been updated (OED Third Edition, March 2022).
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n.1988