pole plate

名词 n.
中文释义

英文释义

名词 n.
  1. A horizontal timber resting on the tiebeams of a roof and receiving the ends of the rafters, differing from the plate in that it is not resting on the wall.
    — The "pole-plate" is parallel to the wall-plate, and rests on the end of the "tie-beam." The "purlin" is a piece of timber running parallel to the pole-plate, and midway between it and the "ridge-pole," the purlins resting on the principal rafters.
  2. Any of various plates used to secure an attachment to a pole.
    — The pole plate normally has a greater radius than the largest pole top, and when drawn into place not only conforms closely to the circumference of the pole, but draws down against the gain, thus providing sufficient spring tension to compensate any shrinkage in the pole or cross arm.
  3. A structure that forms at the pole of the spindle during the first meiotic or mitotic division in some animals.
    — The pole plate of the 1st spindle becomes immediately the equatorial of the 2nd, where the 14 chromosomes are arranged in pairs, of each of which one goes to one pole and one to the other.

词形变化

pole plates plural pole-plate alternative
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