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systole the rhythmic contraction made by the heart and its ventricles that pushes blood from the chambers. (Cf. diastole.)
syzygy in astronomy, the alignment, either in conjunction or opposition, of three celestial bodies within the same gravitational system, esp. the sun, moon, and earth. [3 definitions]
sz. abbreviation of "size."
T abbreviation of "true," in agreement with fact.
t the twentieth letter of the English alphabet. [3 definitions]
TA abbreviation of "teaching assistant."
Ta symbol of the chemical element tantalum.
tab a small, flat projection, such as a loop, strap, or flap, used for pulling, hanging, or opening, or as a means of identifying something. [7 definitions]
tabard formerly, a capelike jacket worn outdoors by peasants. [3 definitions]
tabby a domestic cat with gray striped fur. [3 definitions]
tabernacle a place of worship, esp. a spacious one. [3 definitions]
tabes dorsalis a disease of the nervous system, usu. caused by syphilis and characterized by pain and an increasing loss of voluntary motor control and organ distress.
tab key the tabulator on a typewriter.
table an article of furniture, usu. with a flat, horizontal top and supported by one or more vertical legs. [11 definitions]
tableau an artistically arranged group of actors who remain motionless for a moment on stage, as at the end of a scene. [2 definitions]
tableau vivant living picture (French); a scene, statue, or picture depicted by costumed and posed actors who remain silent and motionless.
tablecloth a cloth used to cover a dining table in order to protect its surface during a meal.
table d'hôte a complete meal offered at a restaurant or hotel with a fixed list of courses and a set price. (Cf. à la carte, prix fixe.)
table-hop (informal) to move from table to table to visit and talk at a party, nightclub, restaurant, or the like.
tableland a level, elevated expanse of land; plateau.
table linen tablecloths, napkins, place mats, and the like.