The Collaborative International Dictionary of English v.0.48:

Capitular \Ca*pit"u*lar\, n. [LL. capitulare, capitularium, fr.
   L. capitulum a small head, a chapter, dim. of capit head,
   chapter.]
   1. An act passed in a chapter.
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   2. A member of a chapter.
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            The chapter itself, and all its members or
            capitulars.                           --Ayliffe.
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   3. The head or prominent part.
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The Collaborative International Dictionary of English v.0.48:

Capitular \Ca*pit"u*lar\, a.
   1. (Eccl.) Of or pertaining to a chapter; capitulary.
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            From the pope to the member of the capitular body.
                                                  --Milman.
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   2. (Bot.) Growing in, or pertaining to, a capitulum.
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   3. (Anat.) Pertaining to a capitulum; as, the capitular
      process of a vertebra, the process which articulates with
      the capitulum of a rib.
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WordNet (r) 3.0 (2006):

capitular
    adj 1: of or pertaining to an ecclesiastical chapter; "capitular
           estates" [syn: capitular, capitulary]