ytterbium ytterbic • yttria · · · Info · Definitions · Synonyms · Characters · · ytterbium · · Text Latin · · Script 9 · · Length Definitions · · · (noun) a soft silvery metallic element; a rare earth of the lanthanide series; it occurs in gadolinite and monazite and xenotime. Synonyms: Yb, atomic number 70. · · Noun Definition 1 Synonyms · · · yb · · Synonym 1 atomic number 70 · · Synonym 2 Characters · · b latin small letter b U+0062 e latin small letter e U+0065 i latin small letter i U+0069 m latin small letter m U+006D r latin small letter r U+0072 t latin small letter t U+0074 u latin small letter u U+0075 y latin small letter y U+0079