maturing of petroleum
41Archaea — Archea redirects here. For the geologic eon, see Archean. For the spider family, see Archaeidae. Archaea Temporal range: Paleoarchean – Recent Halobacteria sp. strain NRC 1, each cell about 5 μm long …
42education — /ej oo kay sheuhn/, n. 1. the act or process of imparting or acquiring general knowledge, developing the powers of reasoning and judgment, and generally of preparing oneself or others intellectually for mature life. 2. the act or process of… …
43fat — fatless, adj. fatlike, adj. /fat/, adj., fatter, fattest, n., v., fatted, fatting. adj. 1. having too much flabby tissue; corpulent; obese: a fat person. 2. plump; well fed: a good, fat chicken. 3. consisting of or containing fat; greasy; oily:… …
44frost — frostless, adj. frostlike, adj. /frawst, frost/, n. 1. a degree or state of coldness sufficient to cause the freezing of water. 2. Also called hoarfrost. a covering of minute ice needles, formed from the atmosphere at night upon the ground and… …
45Frost — /frawst, frost/, n. Robert (Lee), 1874 1963, U.S. poet. * * * I Atmospheric moisture that crystallizes directly on the ground and on exposed objects. The term also refers to the occurrence of subfreezing temperatures that affect plants and crops …
46insecticide — insecticidal, adj. /in sek teuh suyd /, n. 1. a substance or preparation used for killing insects. 2. the act of killing insects. [1860 65; INSECT + I + CIDE] * * * Any of a large group of substances used to kill insects. Such substances are… …
47farm management — ▪ agriculture Introduction making (industrial engineering) and implementing of the decisions (agribusiness) involved in organizing and operating a farm for maximum production and profit. Farm management draws on agricultural economics for… …
48Djerassi , Carl — (1923–) American chemist Djerassi was born in the Austrian capital of Vienna, the son of a Bulgarian physician and an Austrian mother. As both parents were Jewish, Djerassi emigrated to America in 1939. He was educated at Kenyon College, Ohio,… …
