pole plate

noun3

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 end of the common rafter is birdsmouthed and nailed to the pole plate . — 1895
2. •
   Any of various plates used to secure an attachment to a pole.

   • A heavy three-hole pole plate with crossarm and porcelain elbow makes the bracket easy to put up and wire, serving also as a protection for the wires. — 1918
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. — 1899