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specialize to devote one's attentions to a specific pursuit or field of study. [4 definitions]
special needs any additional or alternative educational needs that can accompany disabilities, esp. of young people in a school system.
special-needs having additional or different educational needs from the majority because of a disability.
specialty the condition of being special. [6 definitions]
speciation the evolutionary process through which new species develop.
specie money in coin form; coin.
species in biology, the most fundamental classification of living things, comprising individuals that can breed with one another but not with those of other species; subdivision of a genus. [3 definitions]
specific pertaining explicitly to a particular thing or person; particular; definite. [6 definitions]
specification the act of specifying. [3 definitions]
specific gravity the ratio of the weight or mass of a given substance to that of a standard, which for solids and liquids is water and for gases is hydrogen or air.
specificity the condition or quality of being specific. [2 definitions]
specify to name or otherwise indicate explicitly. [4 definitions]
specimen a portion or example that is representative of a larger whole. [2 definitions]
specious apparently true, genuine, or plausible, but actually worthless, as an argument or evidence. [2 definitions]
speck a small spot, blemish, or discoloration. [4 definitions]
speckle a speck or small mark, esp. on skin, feathers, leaves, or the like. [3 definitions]
speckled trout the brook trout, or the sea trout.
specs (informal) specifications. [2 definitions]
spectacle a visible, usu. impressive thing or action, esp. a public performance or display. [3 definitions]
spectacular of, pertaining to, or like a spectacle; impressive; marvelous. [3 definitions]
spectator one that watches or observes. [2 definitions]