s, a, o, b, e, l, n, c, h, r, t, i, u are letters that make 'subclass Archaeornithes'
OR, sub, IT, he, la, subclass, lass, RN, He, arc, ar, cl, HA, SS, arch, BC, as, ass, class, nit, Archaeornithes, AS, AR, LA, Ar, As, Cl, Es, La, Ni, Rn, Th are words within 'subclass Archaeornithes'
1 possible definitions for 'subclass Archaeornithes'
Under this definition, subclass archaeornithes is a noun and has the following properties:
Archaeornithes has the same meaning as subclass Archaeornithes
'subclass Archaeornithes' can be a type of class.
'subclass Archaeornithes' can be a member of Aves, class Aves.
genus Sinornis, genus Archeopteryx, genus Archaeopteryx, genus Ibero-mesornis, genus Archaeornis are members of 'subclass Archaeornithes'.