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Webster's 1913 Dictionary
PERITROCHIUM
Per
`i *tro "
chi
*
um,
n.
Etym:
[
NL.
,
fr.
Gr.
(
Mech.
)
Defn:
The
wheel
which,
together
with
the
axle,
forms
the
axis
in
peritrochio,
which
see
under
Axis.
The Wordsmith Dictionary
The Wordsmith Dictionary