a compass having adjustable legs, set perpendicular to the paper and sliding along a horizontal bar so as to permit the drawing of large circles.
an instrument for drawing large circles or arcs, consisting of a horizontal beam along which two vertical legs slide Also called trammel
- Beam fill
material, as concrete, for filling spaces between beams or joists in or on top of a masonry wall.
- Beam engine
noun 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