Belemnitidae Belemnites • Belemnoidea · · · Info · Definitions · Characters · · Belemnitidae · · Text Latin · · Script 12 · · Length 4 · · Syllables Definitions · · · (noun) family of extinct Mesozoic cephalopods. Synonyms: family Belemnitidae. · · Noun Definition 1 Characters · · B latin capital letter b U+0042 a latin small letter a U+0061 d latin small letter d U+0064 e latin small letter e U+0065 i latin small letter i U+0069 l latin small letter l U+006C m latin small letter m U+006D n latin small letter n U+006E t latin small letter t U+0074