тројка

Noun

 * 1) three (name of the digit)
 * 2) C (grade)
 * 3) trey (playing card)
 * 4) anything numbered three (tram, bus, player with a jersey number 3 etc.)
 * 5) troika
 * 6) trio (group of three)
 * 7) threesome, threeway

Etymology
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Noun

 * 1) three (digit or figure)
 * 2) anything numbered three (playing card, tram, bus, player with a jersey number 3 etc.)
 * 3) the school grade '3'
 * 4) trio (group of three)
 * 5)  triplets
 * 6) troika