| spontaneous evolution | The unaided delivery of the foetus from a transverse lie. (05 Mar 2000) |
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| spontaneous fracture | A fracture occurring without any external injury. (05 Mar 2000) |
| spontaneous gangrene of newborn | Gangrene due to vascular occlusion of unknown cause, usually in marasmic or dehydrated infants. (05 Mar 2000) |
| spontaneous generation | The obsolete hypothesis that living organisms can originate from nonliving matter. (09 Oct 1997) |
| spontaneous intermittent mandatory ventilation | Intermittent mandatory ventilation spontaneously initiated by the patient, to increase tidal volume, and subsequently synchronised with patient's respiratory cycle. Synonym: synchronised intermittent mandatory ventilation. (05 Mar 2000) |
| spontaneous mutation | A mutation which occurs by itself without first being affected by a mutagen, for example during the process of DNA replication. Spontaneous mutations arise at a remarkably constant rate. The rate that spontaneous mutations arise has been used as an evolutionary clock to estimate how closely related two (or more) separate species are to each other. (09 Oct 1997) |
| spontaneous osteolysis | <radiology> Several syndromes of vanishing bones: (Cf: rapid demineralization), idiopathic hereditary osteolysis, autosomal dominant, manifest in early childhood, carpals and tarsals involved first, autosomal-recessive carpal and tarsal osteolysis, idiopathic osteolysis with nephropathy, carpals, tarsals, adjacent tubular bones involved, azotaemia may lead to death in early adulthood, massive osteolysis of Gorham, angiomatous destruction (12 Dec 1998) |
| spontaneous phagocytosis | Phagocytosis occurring when a culture of bacteria is brought in contact with washed leukocytes in an indifferent medium, such as a physiologic salt solution. (05 Mar 2000) |
| spontaneous pneumothorax | A sudden collapse of the lung that occurs as the result of a tear in the lung tissue. May be seen after strenuous activity, coughing or straining. Thin males are at greatest risk for this disorder. (27 Sep 1997) |
| spontaneous process | <chemistry> A process that occurs without outside intervention. Spontaneity is independent of rate. To be spontaneous a process must increase the entropy of the universe. (09 Jan 1998) |
| spontaneous recovery | The return of the conditioned response, after apparent extinction, in the presence of the conditioned stimulus without the unconditioned stimulus also being present. See: classical conditioning. (05 Mar 2000) |
| spontaneous transformation | Transformation of a cultured cell that occurs without the deliberate addition of a transforming agent. Cells from some species, especially rodents, are particularly prone to such spontaneous transformation. (18 Nov 1997) |
| spontaneous version | Turning of the foetus effected by the unaided contraction of the uterine muscle. (05 Mar 2000) |
| spook | 1. A spirit; a ghost; an apparition; a hobgoblin. Alternative forms: spuke. 2. <zoology> The chimaera. Origin: D. Spook; akin to G. Spuk, Sw. Spoke, Dan. Spogelse a specter, spoge to play, sport, joke, spog a play, joke. Source: Websters Dictionary (01 Mar 1998) |
| spool | A piece of cane or red with a knot at each end, or a hollow cylinder of wood with a ridge at each end, used to wind thread or yarn upon. Spool stand, an article holding spools of thread, turning on pins, used by women at their work. Origin: OE. Spole, OD. Spoele, D. Spoel; akin to G. Spule, OHG. Spuola, Dan. & Sw. Spole. (01 Mar 1998) |
| sporophore |
a spore-bearing branch or organ: the part of the thallus of a sporophyte that develops spores; in ferns and mosses and liverworts is practically equivalent to the sporophyte
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| sporophyte |
the spore-producing individual or phase in the life cycle of a plant having alternation of generations
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| sporotrichosis |
a chronic fungal infection of the skin and lymph nodes
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| Sporozoa |
strictly parasitic protozoans that are usually immobile; includes plasmodia and coccidia and piroplasms and malaria parasites
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| sporozoan |
parasitic spore-forming protozoan
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| spo | (British) a waterproof bag for holding bathrooms items (soap and toothpaste etc.) when you are travelling |
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| spo | you wash your body with a sponge or washcloth instead of in a bathtub |
| spo | a light porous cake made with eggs and flour and sugar without shortening |
| spo | any soft porous fabric (especially in a loose honeycomb weave) |
| spo | wash with a sponge |
| spo | clean with a sponge, by rubbing |
| spo | a genus of Porifera |
| spo | any of several tropical annual climbers having large yellow flowers and edible young fruits |
| spo | a wet mop with a sponge as the absorbent |
| spo | an edible and choice morel with a globular to elongate head with an irregular pattern of pits and ridges |
| spo | an edible and choice morel with a globular to elongate head with an irregular pattern of pits and ridges |
| spo | clean with a sponge, by rubbing |