资料来源 : pyDict

枪眼设备

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

Crenelation \Cren`el*a"tion\ (-?"sh?n), n.
   The act of crenelating, or the state of being crenelated; an
   indentation or an embrasure. [Written also {crenellation}.]

资料来源 : WordNet®

crenelation
     n 1: a rampart built around the top of a castle with regular gaps
          for firing arrows or guns [syn: {battlement}, {crenellation}]
     2: the action of constructing rampparts with gaps for firing
        guns or arrows [syn: {crenellation}]