drumhead

English Thesaurus

1. a membrane that is stretched taut over a drum (noun.artifact)

hypernym	:	membrane,
definition	:	a thin pliable sheet of material (noun.artifact)

part meronym	:	drum, membranophone, tympan,
definition	:	a musical percussion instrument; usually consists of a hollow cylinder with a membrane stretched across each end (noun.artifact)

2. performed speedily and without formality (adj.all)

similar	:	unofficial,
definition	:	not having official authority or sanction (adj.all)