from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The wheel which, together with the axle, forms the axis in peritrochio.
from the GNU version of the Collaborative International Dictionary of English
- n. The wheel which, together with the axle, forms the axis in peritrochio, which see under axis.
from The Century Dictionary and Cyclopedia
- n. A wheel fixed upon an axle so as to turn along with it, constituting one of the mechanical powers called the wheel and axle. See wheel.
From Ancient Greek περί ("around") + τροχός ("a wheel"). (Wiktionary)
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