When t is followed by h, as in think and that, the combination really forms a distinct sound for which we have no single character. This combination has two sounds in English; aspirated, as in think, and vocal, as in that.
The letters ti, before a vowel, and unaccented, usually pass into the sound of sh, as in nation, motion, partial substantiate; which are pronounced nashon, moshon, parshal, substanshate. In the case, t loses entirely its proper sound or use, and being blended with the subsequent letter, a new sound results from the combination, which is in fact a simple sound. In a few words, the combination ti has the sound of the English ch, as in Christian, mixtion, question.
T, as an abbreviation, stands for theologia; as, S.T.D. sanctoe theologioe doctor, doctor of divinity. In ancient monuments and writings, T is an abbreviature, which stands for Titus, Titius or Tullius. As a numeral, T, among the Latins, stood for 160, and with a dash over the top, T, for 160,000.
In music, T is the initial of tenor, vocal and instrumental; of tacet, for silence, as adagio tacet, when a person is to rest during the whole movement. In concertos and symphonies, it is the initial of tutti, the whole band, after a solo. It sometimes stands for tr. or trillo, a shake.
