Anallagmatic
Pronunciation : An`al*lag*mat"ic
Part of Speech : a.
Etymology : [Gr. (Math.)
Definition : Defn: Not changed in form by inversion. Anallagmatic curves, a class of curves of the fourth degree which have certain peculiar relations to circles; -- sometimes called bicircular quartics. -- Anallagmatic surfaces, a certain class of surfaces of the fourth degree.
Source : Webster's Unabridged Dictionary, 1913