T的词源

英文词源

T

to cross one's t's (and dot one's i's) "to be exact" is attested from 1849. Phrase to a T "exactly" is recorded from 1690s, though the exact signification remains uncertain despite much speculation. The measuring tool called a T-square (sometimes suggested as the source of this) is recorded by that name only from 1785. The T-cell (1970) so called because they are derived from the thymus. As a medieval numeral, T represented 160.

中文词源

T：英语字母表的第二十个字母

来自希腊字母 tau,来自希伯来字母 taw,标记，符号。

该词的英语词源请访问找单词词源英文版：T 词源，T 含义。