tri·no·mi·al /traɪˈnomiəl/
  (a.)三項式的
  tri·no·mi·al /traɪˈnomɪəl/ 名詞
  三名的
  Tri·no·mi·al n.  Math. A quantity consisting of three terms, connected by the sign + or -; as, x + y + z, or ax + 2b - c².
  Tri·no·mi·al, a.
  1. Math. Consisting of three terms; of or pertaining to trinomials; as, a trinomial root.
  2. Nat. Hist. Consisting of, or involving the use of, three terms; as, a trinomial systematic name specifying the genus, species, and variety.
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