un|nat´u|ral|ness — un|nat|u|ral «uhn NACH uhr uhl, NACH ruhl», adjective. 1. not natural; not normal; not what is usual or to be expected; abnormal: »unnatural weather for the time of year. The cold war…is not unnatural (Manchester Guardian). SYNONYM(S): unusual,… … Useful english dictionary
un|nat|u|ral — «uhn NACH uhr uhl, NACH ruhl», adjective. 1. not natural; not normal; not what is usual or to be expected; abnormal: »unnatural weather for the time of year. The cold war…is not unnatural (Manchester Guardian). SYNONYM(S): unusual, irregular,… … Useful english dictionary
natural science — nat′ural sci′ence n. bio phs a science or knowledge of objects or processes observable in nature, as biology, physics, chemistry, and geology • Etymology: 1350–1400 nat′ural sci′entist, n … From formal English to slang
Natural Bridges — Nat′ural Bridg′es n. geg a national monument in SE Utah containing three natural bridges. Largest, 222 ft. (68 m) high; 261 ft. (80 m) span … From formal English to slang
natural childbirth — nat′ural child′birth n. med pat childbirth involving little or no use of drugs or anesthesia, involving a program in which the mother is psychologically and physically prepared for the birth process • Etymology: 1930–35 … From formal English to slang
natural gas — nat′ural gas′ n. ene a combustible mixture of gaseous hydrocarbons that accumulates in porous sedimentary rocks: used as a fuel and to make carbon black, acetylene, and synthesis gas • Etymology: 1815–25 … From formal English to slang
natural history — nat′ural his′tory n. bio the study of organisms and natural objects, esp. with reference to their history and native environment • Etymology: 1560–70 … From formal English to slang
natural killer cell — nat′ural kill′er cell n. bai (mcr imv)imu a small killer cell that destroys virus infected cells or tumor cells without activation by an immune system cell or antibody Compare killer T cell … From formal English to slang
natural language — nat′ural lan′guage n. ling. a language used as a native tongue by a group of speakers Compare artificial language • Etymology: 1875–80 … From formal English to slang
natural law — nat′ural law′ n. a principle or body of laws considered as derived from nature, right reason, or religion and as ethically binding in human society • Etymology: 1350–1400 … From formal English to slang