| sporadicalness | (noun) The quality of being rare and scattered in occurrence. | - |
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| sporangiophore | (noun) stalk bearing one or more sporangia | - |
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| sporangium | (noun) organ containing or producing spores | Synonyms: spore case, spore sac |
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| spore | (noun) a small usually single-celled asexual reproductive body produced by many nonflowering plants and fungi and some bacteria and protozoans and that are capable of developing into a new individual without sexual fusion | - |
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| sporocarp | (noun) specialized leaf branch in certain aquatic ferns that encloses the sori or clusters of sporangia | Synonyms: spore case |
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| sporophore | (noun) 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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| sporophyl | (noun) leaf in ferns and mosses that bears the sporangia | Synonyms: sporophyll |
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| sporophyll | (noun) leaf in ferns and mosses that bears the sporangia | Synonyms: sporophyl |
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| sporophyte | (noun) the spore-producing individual or phase in the life cycle of a plant having alternation of generations | - |
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| sporotrichosis | (noun) a chronic fungal infection of the skin and lymph nodes | - |
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| sporozoan | (noun) parasitic spore-forming protozoan | - |
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| sporozoite | (noun) one of the minute active bodies into which sporozoans divide in one stage of their life cycle | - |
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| sporran | (noun) a fur or leather pouch worn at the front of the kilt as part of the traditional dress of Scottish Highlanders | - |
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| sport | (noun) an active diversion requiring physical exertion and competition | Synonyms: athletics |
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| (noun) the occupation of athletes who compete for pay | - |
| (noun) verbal wit or mockery (often at another's expense but not to be taken seriously) | Synonyms: fun, play |
| (noun) someone who engages in sports | - |
| (noun) (biology) an organism that has characteristics resulting from chromosomal alteration | Synonyms: mutant, mutation, variation |
| (noun) a person known for the way she (or he) behaves when teased or defeated or subjected to trying circumstances | - |
| (noun) (Maine colloquial) a temporary summer resident of Maine | Synonyms: summercater |
| sportfishing | (noun) the act of someone who fishes as a diversion | Synonyms: fishing |
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| sportiness | (noun) The characteristic appearance and behavior of people who partake in sports. | - |
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| sportiveness | (noun) lively high-spirited playfulness | Synonyms: friskiness, frolicsomeness |
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| sportsball | (noun) Sports of an unspecified kind, usually condescending | - |
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| sportscast | (noun) a broadcast of sports news or commentary | - |
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| sportscaster | (noun) an announcer who reads sports news or describes sporting events | Synonyms: sports announcer, sports commentator |
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| sportsman | (noun) a male who engages in sports | - |
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| sportsmanship | (noun) fairness in following the rules of the game | - |
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| sportswear | (noun) attire worn for sport or for casual wear | Synonyms: activewear, athletic wear |
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| sportswoman | (noun) a female who engages in sports | - |
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| sportswriter | (noun) a journalist who writes about sports | Synonyms: sports writer |
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| sporulation | (noun) asexual reproduction by the production and release of spores | Synonyms: monogenesis |
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