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Convolution

02319 Con`vo*lu"tion (?), n. 1. The act of rolling anything upon itself, or one thing upon another; a winding motion.O'er the calm sea, in convolution swift,
The feathered eddy floats.
Thomson.2. The state of being rolled upon itself, or rolled or doubled together; a tortuous or sinuous winding or fold, as of something rolled or folded upon itself.Blackmore.3. (Anat.) An irregular, tortuous folding of an organ or part; as, the convolutions of the intestines; the cerebral convolutions. See Brain.

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Contact

02311 Con"tact (?), n. [L. contactus, fr. contingere, -tactum, to touch on all sides. See Contingent.] 1. A close union or junction of bodies; a touching or meeting.2. (Geom.) The property of two curves, or surfaces, which meet, and at the point of meeting have a common direction.3. (Mining) The plane between two adjacent bodies of dissimilar rock.Raymond.Contact level, a delicate level so pivoted as to tilt when two parts of a measuring apparatus come into contact with each other; -- used in precise determinations of lengths and in the accurate graduation of instruments.

Coronal

02325 Cor"o*nal (k?r"?-n it a /it l atau, it esp. in science /it , k?-r?"n it a /it l; 277), a. [L. coronalis: cf. F. coronal.] 1. Of or pertaining to a corona (in any of the senses).The coronal light during the eclipse is faint. Abney.2. Of or pertaining to a king's crown, or coronation.The law and his coronal oath require his undeniable assent to what laws the Parliament agree upon. Milton.3. Of or pertaining to the top of the head or skull.4. (Zo\'94l.) Of or pertaining to the shell of a sea urchin.Coronal suture (Anat.), a suture extending across the skull between the parietal and frontal bones; the frontoparietal suture.