a sex chromosome of humans and most mammals that is present only in males and is paired with an X chromosome.
Why Are A, E, I, O, U, And Y Called “Vowels”?In elementary school, we all learned the vowels of the English language: A, E, I, O, U and sometimes Y. But, what makes a vowel a vowel?
Spelling Still MattersRead more in this article about some frequently asked questions and fun facts related to our definitions.
Compare X chromosome.
Origin of Y chromosome
First recorded in 1920–25
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019