control rod
noun
plural control rods
: a rod of a neutron-absorbing material (such as boron carbide) used to regulate the rate of nuclear fission in a reactor
Word History
First Known Use
1906, in the meaning defined above
- pull a vanishing act
- pull ahead
- pull an all-nighter
- pull apart
- pull aside
- pull at
- pull at one's heartstrings
- pull away
- pull box
- pull date
- pull down
- pull for
- pull hitter
- pull in
- pull in one's horns
- pull into
- pull off
- pull on
- pull one's hair out
- pull one's leg
- pull one's own weight
- pull one's weight
- pull oneself together
- pull out
- pull out all the stops