The Collaborative International Dictionary of English v.0.48:

Regardant \Re*gard"ant\ (-ant), a. [F. regardant, fr. regarder.
   See Regard, v. t.] [Written also regardant.]
   1. Looking behind; looking backward watchfully.
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            [He] turns thither his regardant eye. --Southey.
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   2. (Her.) Looking behind or backward; as, a lion regardant.
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   3. (O.Eng.Law) Annexed to the land or manor; as, a villain
      regardant.
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WordNet (r) 3.0 (2006):

regardant
    adj 1: looking backward