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sustentaculum

(sŭs′tən-tăkyə-ləm)
n. pl. sus•ten•tac•u•la (-lə)
  1. An anatomical structure that supports another anatomical structure.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.