Definition of ambilineal in English:

ambilineal

Pronunciation /ˌambɪˈlɪnɪəl/

adjective

Anthropology Sociology
  • Designating or relating to a kinship system in which an individual may claim membership of either the father's or the mother's lineage group, but not both.

Origin

1940s; earliest use found in Man: a monthly record of anthropological science. From ambi- + lineal, after matrilineal, patrilineal.