(psychiatry) Delusional beliefs shared by multiple, if not all, members of a family.

A family of proteins and their encoding genes found in vertebrates resulting from the triplicate replication of the ancestral single gene found in non-vertebrates, that concern activity of microtubules and actin filaments.

Timing sexual intercourse to avoid the time of ovulation (if pregnancy is not wanted) or to fall within that time (if pregnancy is desired).

(Mormonism) An evening, usually Monday, set apart once a week for family activity such as lessons, games, and prayer.

plural of familial Mediterranean fever

plural of gold star family

A group of people who get along well together.

Accidents will always happen, even where there is an expectation of success.

(humorous) A supposed motto describing the dynamics of incest.

Shared religious observance strengthens family stability.