o

Reading level: easy

Estimated CEFR level: A1 — Beginner

Estimated from word frequency; not an official CEFR classification.

Definition

noun a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; the most abundant element in the earth's crust
noun the 15th letter of the Roman alphabet
noun the blood group whose red cells carry neither the A nor B antigens

See o'.

Yo’r not fearfo’ o’ her. — Hard Times, Charles Dickens
As you like, O Queen! — For the Sake of the School, Angela Brazil
Gi' oi a drap o' zyder." — The Lock and Key Library: Classic Mystery and Detective Stories: Modern English, Unknown

oxygen, atomic number 8

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