fatherhood, being a father / parental descent from a father / (law) legal acknowledgement of a man's fatherhood of a child / (figuratively) authorship

(anthropology, history) A social system in which the father is head of the household, having authority over women and children, and in which lineage is traced through the male line.

(pathology) clinical chemistry.

(physics) the average distance travelled between two similar events; especially by molecules in a gas or liquid, electrons or phonons in a crystal or neutrons in a moderator

(Britain) A medicine that is protected by a patent. / (US) Any medicine with a proprietary formula which can be bought without a prescription, irrespective of whether it is protected by a patent.

(law) Rare form of letters patent (“a type of legal document in the form of an open letter issued by an authority granting a monopoly, right, status, or title to a person or organization”).

(law) A type of legal document in the form of an open letter issued by an authority granting a monopoly, right, status, or title to a person or organization.

plural of letter patent

A sister of someone’s father. / The wife of a sibling of someone’s father.

In a clear and unambiguous manner.