本草名物词以“×七”格式构词的具有相当的数量。植物名中以“×七”式构词的也多指药用植物。其药用部位多为根须部。在“×七”所指植物的产地,“七”与“须”读音十分相近,便用笔画较减省的“七”表示根须之义。“×七”式名物词在命名取义、文字借用、音读演变等方面存在复杂的情形。 Materia Medica nouns to “* seven ” format has a considerable amount of word formation. Plant names to “× seven ” type of word-building also refers more to medicinal plants. Most of its medicinal parts for the root Department. In the place of the plant “” “seven ”, “seven ” and “whispered ” pronunciation is very similar, they use less stroke “seven ” to indicate root meaning. “Seven ” type nominal words in the naming of nouns, borrowed words, sound evolution and other aspects of the existence of complex situations.