circulett (ser kulet)

[L. circulus (see cir Ly cle) + dim. -et.] A circlet. Spenser. circuli, n. Plural of circulus. FRA IMG:content-0447.png:[ocr errors] A PV VCS TLD IMG:content-0448.png:[blocks in formation] heart, diminishes as it proceeds to the capillaries, and increases as it comes back to the heart again in the great veins. It is estimated as from 15 to 20 inches per second in the aorta, on the average, and in the capillaries as.02 to.03 of an inch per second. The time for the complete circuit in man is a little le than half a minute. The tension of the blood in the human aorta is probably between 5.90 and 7.87 inches of mercury above the atmospheric pre ure. It diminishes continuously in the arteries, capillaries, and veins, and in the large venous trunks near the heart, as the subclavian, be comes slightly le than the called negative. The circu. atmospheric pre ure, and is lati on of the blood was first gram. correctly described and fully established by Harvey (1628); but the exact way in which the blood pa ed from the arteries to the veins was uncovered the capillaries (1661). known until Malpighi dis In the mean time the main features of the lymphatic system had been worked out by Bartholin and others. The determination of blood pre ures and velocities and the functions of the vasomotor nerves has been the work A2 HA Leb IMG:content-0449.png:[ocr errors] circulinet (sérʼkū-lin), a. [L. circulus (see circle) + -ine1.] Moving in a circle; circular; circulatory. With motion circuline Let turn about. Dr. H. More, Psych a than asia, III. ii. 33. circulus (sér kū-lus), n.; pl. circuli (-li). [L. (ML., NL.): see circle .] 1. A circle. Specifically-2. A time-signature in early music. In the form of a complete circle, it denoted triple time; in that of an arc only, duple time. 3t. A gla -makers' tool for cutting off the necks THV of gla ve els. E. Phillips , 1706.-4. In an at ., a circle; a ring: especially applied to vascular structures.-5. The head-band of a miter. Since miters in the middle ages were commonly made of stuff, either embroidered or plain, and not stiffened in any other way than by a lining of buckram or similar material, the circulus was an important feature; in very rich miters it becomes the auriphrigium.- Circulus articuli vasculosus, the vascular circle of a joint; the vascular border of the synovial membrane about an articular cartilage.Circulus cephalic us (cephalic circle), in ichth ., the arterial circle formed beneath the base of the skull. Diagram of the Human Heart of the Circulation, viewed from and Ve els, showing the course behind, so that the proper left of left side of the heart in the diathe observer corresponds with the left auricle; LV, left ven tricle; Ao, aorta; A1, arteries to upper part of the body; A2, arteries to lower part of the body; HA, hepatic artery, which sups liver part of its blood; 1, veins of the upper part of the body; V2, veins of IMG:content-0450.png:[blocks in formation] circum-. [= F. circom-, circon-, circum- = circun-, circum- = Pg. circum- = It. circon-, circo-, circun-, circu-, circum-, circom-, and E. around, round2, adv. and prep.] A pre circum fix of Latin origin, meaning 'round about,' 'in a circle,' 'on all sides': frequent in compounds taken from the Latin, or formed in English or other modern tongues. Many such compounds are merely occasional. Only the principal ones are entered in this dictionary.