crenel
  鎗眼;炮門
  Cre·nelle, Cre·nel  n.
  1. An embrasure or indentation in a battlement; a loophole in a fortress; an indentation; a notch. See Merlon, and Illust. of Battlement.
  2. Bot. Same as Crenature.
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  crenel
       n 1: one of a series of rounded projections (or the notches
            between them) formed by curves along an edge (as the
            edge of a leaf or piece of cloth or the margin of a
            shell or a shriveled red blood cell observed in a
            hypertonic solution etc.) [syn: scallop, crenation,
            crenature, crenelle]
       2: a notch or open space between two merlons in a crenelated
          battlement [syn: crenelle]
       v : supply with battlements [syn: crenelate, crenellate]