Fermata -- Mom and Gretchen

Fermata
noun
the holding of a musical note or rest longer than its usual duration.

A composer might indicate a formata that extends a musical note for Mom and Gretchen; for the rest of the family, who are atonal, the composer would indicate a formata that extends a rest indefinitely.

Thanks for the word and the definition to
http://www.factacular.com/subjects/Interesting_Words