Y Y 
,
y /waɪ/ (
plural Y’s,
y’s)
noun [uncountable and countable] the 25th letter of the English alphabet
⇨
Y chromosome,
Y-fronts Y, the /waɪ/
American English informalthe YMCA or YWCA:
She was staying in a room at the Y.
YBrE /waɪ/ 🔊NAmE /waɪ/ 🔊 noun (also y) (Ys, Y's, y's BrE /waɪz/ 🔊 NAmE /waɪz/ 🔊 ) [countable, uncountable] the 25th letter of the English alphabet 英语字母表的第 25 个字母◆'Year' begins with (a) Y/'Y'.year 一词以字母 y 开头。 [uncountable] (mathematics 数学) used to represent a number whose value is not mentioned （代表未知数）◆Can the value of y be predicted from the value of x? 能从 x 值推知 y 值吗？🔊🔊 [uncountable] a person, a number, an influence, etc. that is not known or not named 未知的人（或数、影响等）；未指明的人（或数、影响等）◆Let's suppose X knows what Y is doing. 假设 X 知道 Y 正在干什么。🔊🔊 ➡ see also Y chromosome, Y-Fronts™ YBrE /waɪ/ 🔊NAmE /waɪ/ 🔊 abbreviationthe Y (NAmE, informal) YMCA, YWCA 基督教青年会；基督教女青年会 YBrE /waɪ/ 🔊NAmE /waɪ/ 🔊 symbolthe symbol for the chemical element yttrium （化学元素）钇