epicycle epicycle

Definition(s):

  • (n) a circle that rolls around (inside or outside) another circle; generates an epicycloid or hypocycloid

Derived Word(s)

Usage(s):

  • In recording the hammer blows of 16th and 17th century discoveries that finally put Ptolemy's epicycle machine on science's junk heap, Author Koestler offers personable profiles .
Word of the Day
affectation affectation
/ˌæ fɛk ˈteɪ ʃən /