The term GREEK T'S is a reference to the Greek letter tau, which is represented by the letter 'T' in the Latin alphabet. The crossword solution TAUS is a four-letter word that is derived from the Greek letter tau. Tau is the 19th letter of the Greek alphabet and is used in many words and phrases, including the word 'TAUTOLOGY, ' which means a statement that is true by necessity or by virtue of its logical form.