Old English blod "blood," from Proto-Germanic *blodam "blood" (cf. Old Frisian blod, Old Saxon blôd, Old Norse bloð, Middle Dutch bloet, Dutch bloed, Old High German bluot, German Blut, Gothic bloþ), from PIE *bhlo-to-, perhaps meaning "to swell, gush, spurt," or "that which bursts out" (cf. Gothic bloþ "blood," bloma "flower"), in which case it would be from suffixed form of *bhle-, extended form of *bhel- (2) "to blow, inflate, swell" (see bole).
There seems to have been an avoidance in Germanic, perhaps from taboo, of other PIE words for "blood," such as *esen- (cf. poetic Greek ear, Old Latin aser, Sanskrit asrk, Hittite eshar); also *krew-, which seems to have had a sense of "blood outside the body, gore from a wound" (cf. Latin cruour "blood from a wound," Greek kreas "meat"), which came to mean simply "blood" in the Balto-Slavic group and some other languages.
Inheritance and relationship senses (also found in Latin sanguis, Greek haima) emerged in English by mid-13c. Meaning "person of one's family, race, kindred" is late 14c. As the seat of passions, it is recorded from c.1300. Slang meaning "hot spark, a man of fire" [Johnson] is from 1560s. Blood pressure attested from 1862. Blood money is from 1530s; originally money paid for causing the death of another.
Blood type is from 1928. That there were different types of human blood was discovered c.1900 during early experiments in transfusion. To get blood from a stone "do the impossible" is from 1660s. Expression blood is thicker than water attested by 1803, in reference to family ties of those separated by distance. New (or fresh) blood, in reference to members of an organization or group is from 1880.
1590s, "to smeart with blood;" 1620s, "to cause to bleed," from blood (n.). Meaning "to give an animal its first taste of blood" is from 1781. Related: Blooded; blooding.
The fluid consisting of plasma, red blood cells, white blood cells, and platelets that is circulated by the heart through the arteries and veins, carrying oxygen and nutrients to and waste materials away from all body tissues.
One of the four humors of ancient and medieval physiology, identified with the blood found in the blood vessels, and believed to cause cheerfulness.
Descent from a common ancestor; parental lineage.
The fluid circulating through the heart, arteries, veins, and capillaries of the circulatory system. Blood carries oxygen and nutrients to the cells of the body and removes waste materials and carbon dioxide. It is composed of plasma (mainly water, but with a mixture of hormones, nutrients, gases, antibodies, and wastes), red blood cells (which carry oxygen), white blood cells (which help combat infection), and platelets (which help the blood clot).
(1.) As food, prohibited in Gen. 9:4, where the use of animal food is first allowed. Comp. Deut. 12:23; Lev. 3:17; 7:26; 17:10-14. The injunction to abstain from blood is renewed in the decree of the council of Jerusalem (Acts 15:29). It has been held by some, and we think correctly, that this law of prohibition was only ceremonial and temporary; while others regard it as still binding on all. Blood was eaten by the Israelites after the battle of Gilboa (1 Sam. 14:32-34). (2.) The blood of sacrifices was caught by the priest in a basin, and then sprinkled seven times on the altar; that of the passover on the doorposts and lintels of the houses (Ex. 12; Lev. 4:5-7; 16:14-19). At the giving of the law (Ex. 24:8) the blood of the sacrifices was sprinkled on the people as well as on the altar, and thus the people were consecrated to God, or entered into covenant with him, hence the blood of the covenant (Matt. 26:28; Heb. 9:19, 20; 10:29; 13:20). (3.) Human blood. The murderer was to be punished (Gen. 9:5). The blood of the murdered "crieth for vengeance" (Gen. 4:10). The "avenger of blood" was the nearest relative of the murdered, and he was required to avenge his death (Num. 35:24, 27). No satisfaction could be made for the guilt of murder (Num. 35:31). (4.) Blood used metaphorically to denote race (Acts 17:26), and as a symbol of slaughter (Isa. 34:3). To "wash the feet in blood" means to gain a great victory (Ps. 58:10). Wine, from its red colour, is called "the blood of the grape" (Gen. 49:11). Blood and water issued from our Saviour's side when it was pierced by the Roman soldier (John 19:34). This has led pathologists to the conclusion that the proper cause of Christ's death was rupture of the heart. (Comp. Ps. 69:20.)