[pol-i-graf, -grahf] /ˈpɒl ɪˌgræf, -ˌgrɑf/
an instrument for receiving and recording simultaneously tracings of variations in certain body activities.
a test using such an instrument to determine if a person is telling the truth.
an apparatus for producing copies of a drawing or writing.
a prolific or versatile author.
verb (used with object)
to test (a person) with a polygraph.
an instrument for the simultaneous electrical or mechanical recording of several involuntary physiological activities, including blood pressure, skin resistivity, pulse rate, respiration, and sweating, used esp as a would-be lie detector
a device for producing copies of written, printed, or drawn matter
1794, “mechanical device for making multiple copies of something written or drawn,” from Greek polygraphos “writing much,” from polys “much” (see poly-) + graphos “writing,” from graphein “to write” (see -graphy).
Meaning “instrument for recording several pulsations of the body at the same time” is 1871; first used as a lie detector 1921. Related: Polygraphy (1590s); polygraphic (1771).
polygraph pol·y·graph (pŏl’ē-grāf’)
An instrument that simultaneously records changes in physiological processes such as heartbeat, blood pressure, and respiration.
[puh-lij-uh-nist] /pəˈlɪdʒ ə nɪst/ noun 1. a person who practices or favors .
[puh-lij-uh-nuh s] /pəˈlɪdʒ ə nəs/ adjective 1. of, pertaining to, characterized by, or practicing . 2. Botany. having many pistils or styles.
[puh-lij-uh-nee] /pəˈlɪdʒ ə ni/ noun 1. the practice or condition of having more than one wife at one time. 2. (among male animals) the habit or system of having two or more mates, either simultaneously or successively. 3. (among social insects) the condition of having two or more functioning queens in a colony. 4. Botany. […]
polygyria pol·y·gy·ri·a (pŏl’ĭ-jī’rē-ə) n. An excessive number of convolutions in the brain.