| strobe | (noun) scientific instrument that provides a flashing light synchronized with the periodic movement of an object; can make moving object appear stationary | Synonyms: strobe light, stroboscope |
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| strobile | (noun) cone-shaped mass of ovule- or spore-bearing scales or bracts | Synonyms: cone, strobilus |
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| strobilus | (noun) cone-shaped mass of ovule- or spore-bearing scales or bracts | Synonyms: cone, strobile |
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| stroboscope | (noun) scientific instrument that provides a flashing light synchronized with the periodic movement of an object; can make moving object appear stationary | Synonyms: strobe, strobe light |
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| stroke | (noun) (sports) the act of swinging or striking at a ball with a club or racket or bat or cue or hand | Synonyms: shot |
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| (noun) a light touch with the hands | Synonyms: stroking |
| (noun) a single complete movement | - |
| (noun) any one of the repeated movements of the limbs and body used for locomotion in swimming or rowing | - |
| (noun) a punctuation mark (/) used to separate related items of information | Synonyms: diagonal, separatrix, slash, solidus, virgule |
| (noun) a mark made on a surface by a pen, pencil, or paintbrush | - |
| (noun) the maximum movement available to a pivoted or reciprocating piece by a cam | Synonyms: cam stroke, throw |
| (noun) a light touch | - |
| (noun) anything that happens suddenly or by chance without an apparent cause | Synonyms: accident, chance event, fortuity |
| (noun) the oarsman nearest the stern of the shell who sets the pace for the rest of the crew | - |
| (noun) (golf) the unit of scoring in golf is the act of hitting the ball with a club | - |
| (noun) a sudden loss of consciousness resulting when the rupture or occlusion of a blood vessel leads to oxygen lack in the brain | Synonyms: apoplexy, cerebrovascular accident, CVA |
| stroking | (noun) a light touch with the hands | Synonyms: stroke |
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| stroll | (noun) a leisurely walk (usually in some public place) | Synonyms: amble, perambulation, promenade, saunter |
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| stroller | (noun) a small vehicle with four wheels in which a baby or child is pushed around | Synonyms: baby buggy, baby carriage, carriage, go-cart, perambulator, pram, pushchair, pusher |
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| (noun) someone who walks at a leisurely pace | Synonyms: ambler, saunterer |
| stroma | (noun) the supporting tissue of an organ (as opposed to parenchyma) | - |
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| (noun) the dense colorless framework of a chloroplast | - |
| (noun) a mass of fungal tissue that has spore-bearing structures embedded in it or on it | - |
| stromateid | (noun) small marine fish with a short compressed body and feeble spines | Synonyms: butterfish, stromateid fish |
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| strongbox | (noun) a strongly made box for holding money or valuables; can be locked | Synonyms: deedbox |
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| stronghold | (noun) a strongly fortified defensive structure | Synonyms: fastness |
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| strongman | (noun) a powerful political figure who rules by the exercise of force or violence | - |
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| (noun) a man who performs feats of strength at a fair or circus | - |
| strongroom | (noun) a burglarproof and fireproof room in which valuables are kept | - |
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| strontianite | (noun) a mineral consisting of strontium carbonate | - |
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| strontium | (noun) a soft silver-white or yellowish metallic element of the alkali metal group; turns yellow in air; occurs in celestite and strontianite | Synonyms: atomic number 38, Sr |
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| strop | (noun) a leather strap used to sharpen razors | - |
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| strophanthin | (noun) a bitter and very toxic glycoside derived from plants of the genus Strophanthus; in moderate doses it is a cardiac stimulant but in larger doses it is a powerful poison; used in Africa as an arrow poison | - |
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| strophanthus | (noun) any of various shrubs or small trees of the genus Strophanthus having whorled leaves and showy flowers of various colors in dense and corymbose clusters; some have poisonous seeds | - |
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| strophe | (noun) one section of a lyric poem or choral ode in classical Greek drama | - |
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