o-
Word Rarity
Common
Frequency: Zipf frequency 5.12 in modern English
1
Scrabble Score
1
Letters
2
Syllables
1
Unique Chars
Meaning
noun
A blood type that has no antigens. It lacks the A, B and Rh factors on the blood cells. It is the universal donor for blood and can give blood to any blood type, but can only receive O- blood.
prefix