backsight

n. 后视, 表尺缺口

词形变化

backsights 复数 backsights backsighted backsighting backsights 三单 backsighting 现在分词 backsighted 过去式 backsighted 过去分词

释义与例句

n.
  1. 1.

    The rear sight of a firearm.

    Holonym: iron sights

  2. 2.

    A measurement or reading taken back towards a point of known elevation, used to calculate the height of the surveying instrument (theodolite, transit, total station).

  3. 3.

    A measurement of a previously shot point, used to set the angle to zero when occupying a new position.

v.
  1. 1.

    To shoot a backsight.

相关短语

blow a backsight

词源

From back + sight.

来源：wiktionary