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X chromosome

noun Genetics.

a sex chromosome of humans and most mammals that determines femaleness when paired with another X chromosome and that occurs singly in males.

Compare Y chromosome.

Origin:
1910–15

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Link To x chromosome

WordNet

x chromosome
noun
the sex chromosome that is present in both sexes: singly in males and doubly in females; "human females normally have two X chromosomes"

WordNet® 3.0, © 2006 by Princeton University.
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00:10

X chromosome is always a great word to know.

So is flibbertigibbet. Does it mean:

an extraordinary or unusual thing, person, or event; an exceptional example or instance.

a chattering or flighty, light-headed person.

LEARN MORE UNUSUAL WORDS WITH WORD DYNAMO...

Matching Quote

"Next, 'real' is what we may call a trouser-word. It is usually thought, and I dare say usually rightly thought, that what one might call the affirmative use of a term is basic—that, to understand 'x,' we need to know what it is to be x, or to be an x, and that knowing this apprises us of what it is not to be x, not to be an x. But with 'real' (as we briefly noted earlier) it is the negative use that wears the trousers."

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