hypsilophodont
Concise Oxford English Dictionary © 2008 Oxford University Press:
hypsilophodont /ˌhɪpsɪˈlɒfədɒnt/
▶noun a small bipedal dinosaur, adapted for swift running.
– origin C19: from mod. L. Hypsilophodontidae (family name), from Gk hupsilophos ‘high-crested’ + odous, odont- ‘tooth’.
'hypsilophodont' also found in these Oxford entries:

