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

Omissive \O*mis"sive\, a. [See {Omit}.]
   Leaving out; omitting. --Bp. Hall. -- {O*mis"sive*ly}, adv.

资料来源 : WordNet®

omissive
     adj : characterized by omissions; "omissive crimes"