You searched for: “arc
A portion of the circumference of a circle that is represented as a curved line.
This entry is located in the following unit: Measurements and Mathematics Terms (page 2)
(a radiographic technique that produces an image of a detailed cross section of bodily tissue using a narrow collimated beam of x-rays that rotates in a full arc around a patient to image the body in cross-sectional slices)
Word Entries containing the term: “arc
arc minute, arc second
Units for measuring small angles, used in astronomy.

An arc minute (symbol ') is one-sixtieth of a degree, and an arc second (symbol ") is one-sixtieth of an arc minute. Small distances in the sky, as between two close stars or the apparent width of a planet's disk, are expressed in minutes and seconds of arc.

This entry is located in the following unit: Astronomy and related astronomical terms (page 3)