spontaneous

Definition of spontaneous in English English dictionary: arising from a momentary impulse; Done by one's own free choice, or without planning; Random; proceeding from natural feeling or native tendency without external constraint; Sudden, without warning; produced without being planted or without human labor : indigenous; Self generated; happening without any apparent external cause
He made a spontaneous offer of help.; not apparently contrived or manipulated : natural; controlled and directed internally : self-active : spontaneous movement characteristic of living things; arising from inherent qualities or tendencies without external efficient cause; {a} voluntary, free, unforced; said or done without having been planned or written in advance; "he made a few ad-lib remarks"; Spontaneous acts are not planned or arranged, but are done because someone suddenly wants to do them. Diana's house was crowded with happy people whose spontaneous outbursts of song were accompanied by lively music + spontaneously spon·ta·neous·ly As soon as the tremor passed, many people spontaneously arose and cheered; {s} instinctive, natural; not premeditated, impromptu, unplanned; arising from internal forces (of a natural phenomena); produced without being planted or without human labor; "wild strawberries"; Proceeding from, or acting by, internal impulse, energy, or natural law, without external force; as, spontaneous motion; spontaneous growth; Produced without being planted, or without human labor; as, a spontaneous growth of wood; Proceding from natural feeling, temperament, or disposition, or from a native internal proneness, readiness, or tendency, without constraint; as, a spontaneous gift or proportion; A spontaneous event happens because of processes within something rather than being caused by things outside it. I had another spontaneous miscarriage at around the 16th to 18th week. + spontaneously spon·ta·neous·ly Usually a woman's breasts produce milk spontaneously after the birth; Done by ones own free choice, or without planning; happening or arising without apparent external cause; "spontaneous laughter"; "spontaneous combustion"; "a spontaneous abortion"; happening or arising without apparent external cause; "spontaneous laughter"; "spontaneous combustion"; "a spontaneous abortion
spontaneous abortion: A miscarriage
spontaneous combustion: Combustion without an external source of heat
spontaneous combustions: plural form of spontaneous combustion
spontaneous generation: the fancied production of living organisms without previously existing parents from inorganic matter, or from decomposing organic matter, a notion which at one time had many supporters; abiogenesis
spontaneous generations: plural form of spontaneous generation
spontaneous pneumothorax: A pulmonary condition resulting in the collection of air within the chest, which occurs absent traumatic injury. Spontaneous Pneumothorax are considered a medical emergency, generally requiring assistive radiographic evaluation to determine the extent of lung collapse, as well as determine the most appropriate course of emergency medical treatment for the patient. Abbreviated as SP
Spontaneous vision: A spontaneous vision occurs unexpectedly, without the use of any facilitating objects or powers
spontaneous abortion: natural expulsion from the uterus of a conceptus that cannot survive outside the womb; also called miscarriage natural expulsion from the uterus of a conceptus that cannot survive outside the womb; also called miscarriage
spontaneous abortion: a natural loss of the products of conception
spontaneous abortion: A pregnancy ending in the spontaneous loss of the embryo or fetus before 20 weeks of gestation
spontaneous abortion: natural abortion, miscarriage
spontaneous combustion: a process where heat is generated within a material by either a slow oxidation reaction or by microorganisms
spontaneous combustion: independent ignition, burning by itself without any catalyst
spontaneous combustion: The ignition of material brought about by a heat producing (exothermic) chemical reaction within the material itself without exposure to an external source of ignition
spontaneous combustion: Self-ignition of combustible material through chemical action (as oxidation) of its constituents -- called also spontaneous ignition
spontaneous combustion: Self-ignition of combustible material through chemical action of its parts
spontaneous combustion: ignition of a substance (as oily rags) resulting from an internal oxidation process
spontaneous combustion: Ignition of a substance, such as oily rags or hay, caused by a localized heat-increasing reaction between the oxidant and the fuel and not involving addition of heat from an outside source. burning caused by chemical changes inside something rather than by heat from outside
spontaneousness: The state or condition of being spontaneous; spontaneity
spontaneously: {a} voluntarily, freely, willingly
spontaneousness: {n} voluntariness
spontaneously: in a spontaneous manner; "this shift occurs spontaneously
spontaneously: without advance preparation; "he spoke ad lib"
spontaneously: in a spontaneous manner; naturally, instinctively; without prior planning, without premeditation, impromptu
spontaneously: In a spontaneous manner; naturally; voluntarily
spontaneously: in a spontaneous manner; "this shift occurs spontaneously"
spontaneousness: {i} state of being spontaneous; quality of being unpremeditated, quality of being impromptu