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Webster's 1913 Dictionary
EPITROCHOID
Ep
`i *tro "choid, n.
Etym:
[
Pref.
epi-
+
Gr.
-oid.] (Geom.)
Defn: A
kind
of
curve.
See
Epicycloid,
any
Trochoid.
The Wordsmith Dictionary
The Wordsmith Dictionary