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Webster's 1913 Dictionary
ARCHIPTERYGIUM
Ar
*
chip
`
te
*ryg "i *
um,
n.
Etym:
[
NL.
,
fr.
Gr.
pref.
arch-
) + (
Anat.
)
Defn:
The
primitive
form
of
fin,
like
that
of
Ceratodus.