Meaning of IDENTICAL in English
1》 exactly alike.
↘(of twins) developed from a single fertilized ovum, and therefore of the same sex and usually very similar in appearance. Compare with fraternal (in sense 3).
2》 Logic & Mathematics expressing an identity.
C16: from med. L. identicus , from late L. identitas (see identity ).
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004