keyhole limpet key holder • Keyhole nebula · · · Info · Definitions · Characters · · keyhole limpet · · Text Common · · Latin · · Scripts 14 · · Length Definitions · · · (noun) marine limpet having a conical shell with an opening at the apex. Synonyms: Fissurella apertura, Diodora apertura. · · Noun Definition 1 Characters · · space U+0020 e latin small letter e U+0065 h latin small letter h U+0068 i latin small letter i U+0069 k latin small letter k U+006B l latin small letter l U+006C m latin small letter m U+006D o latin small letter o U+006F p latin small letter p U+0070 t latin small letter t U+0074 y latin small letter y U+0079