What does allotropic or allotropical mean?
The definition of allotropic and allotropical
Al`lo*trop”ic, Al`lo*trop”ic*al, a.
Etym: [Cf. F. allotropique.]

Of or pertaining to allotropism.

— Al`lo*trop”ic*al*ly, adv. Allotropic state, the several conditions which occur in a case of allotropism.