资料来源 : pyDict

无背的;无背部的

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

Backless \Back"less\, a.
   Without a back.

资料来源 : WordNet®

backless
     adj : lacking a back; "a stool is a backless and armless seat"
           [ant: {backed}]