carbon-nitrogen cycle n.
A chain of thermonuclear reactions in which nitrogen isotopes are formed in intermediate stages and carbon acts essentially as a catalyst to convert four hydrogen atoms into one helium atom with the emission of two positrons. The entire sequence is thought to generate significant amounts of energy in the sun and certain other stars. Also called carbon cycle, nitrogen cycle.
See carbon cycle.
of, like, or containing carbon. Historical Examples These are what we have mainly to look out for, the carbonaceous foods usually being over abundant. Hints on Dairying T. D. Curtis From the above experiments it is inferred that a supply of carbonaceous matter does not increase the crop of barley. Cooley’s Cyclopdia of Practical Receipts […]
noun a stew of beef and onions cooked in beer
a massive, black variety of diamond, found chiefly near São Salvador, Brazil, and formerly used for drilling and other cutting purposes. a piece of meat, fish, etc., scored and broiled. to score and broil. Archaic. to slash; hack. Historical Examples No man in England durst say so much—I would flay him, carbonado him! The Adventures […]
a sauce or dressing for spaghetti, usually containing minced prosciutto or pancetta, egg yolks, and grated cheese. Historical Examples I myself, ignorant of these customs was once carried to the carbonara, the destined place of butchery. The Sonnets, Triumphs, and Other Poems of Petrarch Petrarch