birthfather

As nouns the difference between terms and birthfather

is that terms is while birthfather is the biological father of an adopted child.

As nouns the difference between taxonomy and birthfather

is that taxonomy is the science or the technique used to make a classification while birthfather is the biological father of an adopted child.

As a verb adopt

is (with relationship specified) to take by choice into relationship, child, heir, friend, citizen, etc.

As a noun birthfather is

the biological father of an adopted child.

As an adjective biological

is of or relating to biology.

As a noun birthfather is

the biological father of an adopted child.

Birthmother is a related term of birthfather.

As nouns the difference between birthfather and birthmother

is that birthfather is the biological father of an adopted child while birthmother is the biological mother of an adopted child.

Birthfather is a hyponym of birthparent.

As nouns the difference between birthfather and birthparent

is that birthfather is the biological father of an adopted child while birthparent is a biological parent of an adopted child.