familial

adj

1. (not-comparable)Of or pertaining to a human family.

   “Mark had to leave work due to familial obligations.”

   “In part [Antonio] Conte pulled this off because his manner and his own playing record demand respect. But also he brought back the fun, encouraging a familial atmosphere with barbecues, bottles of wine handed out, and bonding sessions with players and club staff.”

2. (not-comparable)Pertaining to a taxon at the rank of family.

   “Having milky latex is a familial characteristic of Apocynaceae.”

3. (not-comparable)Of or pertaining to any grouping of things referred to as a family.

   “"Grandfather", "mother", and "brother" are some English familial terms.”

   “The late Eocene was a fascinating time with respect to community changes among terrestrial organisms. Among the mammals, for example, the greatest worldwide ordinal (26 total) and familial (about 120, plus bats and modern-type whales) diversity occurred.”

   “As emphasized previously, any particular character varies enormously from group to group in its taxonomic value, and it is quite impossible to predict this value in a group in which that character has not been previously investigated. Stamen number, for example, can be a familial, generic or specific character, or vary greatly within one taxon. The same is true of dioecism, equally so in the bryophytes and flowering plants.”

4. (not-comparable)Inherited.

   “fatal familial insomnia”

   “Cerebral CMs [cavernous malformations] are, for the majority of cases, sporadic lesions. However, familial incidences have been documented for quite some time. In 1928, Kufs reported two cases: an 81-year-old man who presented with "multiple intercranial nodular telangiectases," and his daughter, suspected of harboring a lesion in the pons.”

   “Familial history of cerebral aneurysms in several families has been reported. […] To determine whether familial history is a risk factor, [Wouter] Schievink et al conducted a community-based study of familial aneurysmal SAH [subarachnoid hemorrhage].”