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

Sustentacular \Sus`ten*tac"u*lar\, a. [See {Sustenance}.]
   (Anat.)
   Supporting; sustaining; as, a sustentacular tissue.

资料来源 : WordNet®

sustentacular
     adj : serving to sustain or support; "sustentacular cells"