nerve fiber nerve ending • nerve impulse · · · Info · Definitions · Synonyms · Characters · · nerve fiber · · Text Common · · Latin · · Scripts 11 · · Length Definitions · · · (noun) a threadlike extension of a nerve cell. Synonyms: nerve fibre. · · Noun Definition 1 Synonyms · · · nerve · · Synonym 1 nervus · · Synonym 2 heart · · Synonym 3 mettle · · Synonym 4 spunk · · Synonym 5 boldness · · Synonym 6 brass · · Synonym 7 face · · Synonym 8 cheek · · Synonym 9 steel · · Synonym 10 Characters · · space U+0020 b latin small letter b U+0062 e latin small letter e U+0065 f latin small letter f U+0066 i latin small letter i U+0069 n latin small letter n U+006E r latin small letter r U+0072 v latin small letter v U+0076