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Webster 1913 Edition

Noun.

[Gr. [GREEK] the sheaf of a pulley, roller of a windlass, from [GREEK] to run.]

The science of rotary motion, or of wheel work.

Wilkins.

Noun.

[L. trochilus.] The science of rotary motion.

trochilics ‎(uncountable)

The science of rotary motion, or work done with wheels.
- 1921, Dornford Yates, Anthony Lyveden:
  For setting wheels within wheels, you cannot match Fortune. After all, she has made trochilics her hobby through all the ages.
(Can we find and add a quotation of Wilkins to this entry?)