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| an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle. |
| a scrap or morsel of food left at a meal. |
"In 1896, Miss Audrey Griffin, of Hurstville, New South Wales initiated a 'chain letter' with the object of obtaining 1,000,000 used postage stamps." ["Daily Chronicle," July 27, 1906]
Chain (chān), Ernst Boris. 1906-1979.
German-born British biochemist. He shared a 1945 Nobel Prize for isolating and purifying penicillin, discovered in 1928 by Sir Alexander Fleming.
| chain (chān) Pronunciation Key
A group of atoms, often of the same element, bound together in a line, branched line, or ring to form a molecule. ◇ In a straight chain, each of the constituent atoms is attached to other single atoms, not to groups of atoms. ◇ In a branched chain, side groups are attached to the chain. ◇ In a closed chain, the atoms are arranged in the shape of a ring. |
| Chain, Sir Ernst Boris 1906-1979.
German-born British bacteriologist who, with Howard Florey, developed and purified penicillin in 1939. For this work, they shared a 1945 Nobel Prize with Alexander Fleming, who first discovered the antibiotic in 1928. |
chain(-smoke) definition
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