parental

from The American Heritage® Dictionary of the English Language, 5th Edition.

• adjective Of, relating to, or characteristic of a parent.
• adjective Genetics Of or designating the generation of organisms from which hybrid offspring are produced.

from The Century Dictionary.

• Of or pertaining to parents; proper to or characteristic of a parent: as, parental love; parental government; parental duties.
• Synonyms Paternal, Maternal, etc. See fatherly, motherly.

from the GNU version of the Collaborative International Dictionary of English.

• adjective Of or pertaining to a parent or to parents
• adjective Becoming to, or characteristic of, parents; tender; affectionate; devoted.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective of or relating to a parent
• adjective genetics of the generation of organisms that produce a hybrid
• noun A person fulfilling a parental role.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• adjective designating the generation of organisms from which hybrid offspring are produced
• adjective relating to or characteristic of or befitting a parent