an early type of steam engine, in which a pivoted beam is vibrated by a vertical steam cylinder at one end, so that it transmits motion to the workload, such as a pump, at the other end
- Beam hole
noun a hole in the shield of a nuclear reactor through which a beam of radiation, esp of neutrons, is allowed to escape for experimental purposes
- Beaded lizard
a large, stout-bodied, venomous lizard, Heloderma horridum, inhabiting western Mexico, having black, beadlike scales with yellow to pinkish spots and splotches. Historical Examples The only other venomous reptile found in the United States is the beaded lizard, called Gila monster (pronounced heela). On the Trail Lina Beard and Adelia Belle Beard
- Beam mill
a rolling mill for roughing a bloom and rolling it into a shape.
- Beam-power tube
a vacuum tube in which the stream of electrons flowing to the plate is focused by the action of a set of auxiliary, charged elements, giving an increase in output power.