monozygous twin vs monozygotic twin

monozygous twin and monozygotic twin both are nouns.

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

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

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

Other synonyms of monozygous twin include identical twin.

monozygous twin (noun)	monozygotic 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)