INVERTIBLE
invertible
(adjective) having an additive or multiplicative inverse
Source: WordNet® 3.1
Etymology
Adjective
invertible (not comparable)
Capable of being inverted or turned.
(mathematics, especially of a function or matrix) Able to be inverted, having an inverse.
(chemistry) Capable of being changed or converted.
Source: Wiktionary
In*vert"i*ble, a. Etym: [From Invert.]
1. Capable of being inverted or turned.
2. (Chem.)
Definition: Capable of being changed or converted; as, invertible sugar.
In*vert"i*ble, a. Etym: [Pref. in- not + L. vertere to turn + -ible.]
Definition: Incapable of being turned or changed.
An indurate and invertible conscience. Cranmer.
Source: Webster’s Unabridged Dictionary 1913 Edition