the mother of one's son- or daughter-in-law, as common grandmother of their children; the relationship between women who have grandchildren in common; maternal grandmother vis-à-vis paternal grandmother.

A grandmother of one's spouse.

plural of grandmother-in-law

plural of paternal grandmother

plural of maternal grandmother

plural of great grandmother (alternative spelling of great-grandmothers).

plural of great-grandmother

A hypothetical neuron that represents a complex but specific concept or object, and activates upon recognition.

plural of grandmother cell

(BDSM) A rule at certain events requiring that one's behaviour and appearance be such that it would not shock one's grandmother.