To act as the only guardian of offspring.

A godparent. / A divorced or separated parent who shares custody with the other parent. / A parent in a same-sex couple.

To act as a co-parent; to share custody of a child or children; to share in the responsibility of parenting a child or children.

The parent (either of a separated pair) with whom a child or children do not live the majority of the time.

(physics) the nuclide whose radioactive decay product is a specific daughter nuclide

simple past tense and past participle of co-parent

(of a person) Having three genetic parents; that is, having been produced by a process in which the nucleus of one egg is inserted into the cytoplasm of another egg, which contains mitochondrial DNA, and then the hybrid egg is fertilized by a sperm.

present participle of co-parent

A person who takes care of a child when the normal parents are unavailable.

The coercion of a child into behaving in a hostile or fearful manner toward one of the parents.