something that provides an important central source for growth or development; "the taproot of his resentment"; "genius and insanity spring from the same taproot"
(botany) main root of a plant growing straight downward from the stem
the category of nouns serving as the grammatical subject of a verb
named; bearing the name of a specific person; "nominative shares of stock"
serving as or indicating the subject of a verb and words identified with the subject of a copular verb; "nominative noun endings"; "predicate nominative"