half-length /ˈhæfˈlɛŋ(k)θ, ˈhɑf-/
  (a.)半身的,半身像的半身像,半身肖像畫
  Half-length a. Of half the whole or ordinary length, as a picture.
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  half-length
       adj 1: representing only the upper half of the body; "a half-length
              portrait"
       2: abridged to half its original length
       n : a portrait showing the body from only the waist up