资料来源 : pyDict

双重母音的,连字的

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Diphthongal \Diph*thon"gal\ (?; 115), a.
   Relating or belonging to a diphthong; having the nature of a
   diphthong. -- {Diph*thon"gal*ly}, adv.