identical twin vs monozygous twin

identical twin and monozygous twin both are nouns.

Word	Noun	Adjective	Verb	Adverb
identical twin	Yes	No	No	No
monozygous twin	Yes	No	No	No

As nouns, identical twin and monozygous twin are synonyms defined as:

identical twin and monozygous twin: either of two twins developed from the same fertilized ovum (having the same genetic material)

Other synonyms of identical twin include monozygotic twin.

identical twin (noun)	monozygous twin (noun)
either of two twins developed from the same fertilized ovum (having the same genetic material)	either of two twins developed from the same fertilized ovum (having the same genetic material)