Something which has exactly the same properties as something else.
An identical twin.
Not different or other; not another or others; not different as regards self; selfsame; numerically identical.
Bearing full likeness by having precisely the same set of characteristics; indistinguishable.
Of twins, sharing the same genetic code.
Approximating or approaching exact equivalence.
Exactly equivalent.
For more quotations using this term, see Citations:identical.
Not able to be measured by the same standards as another term in the context.
having a ratio that is not expressible as a fraction of two integers.
having no common integer divisor except 1.
An incommensurable value or quantity; an irrational number.