rhesus factor
Word Rarity
Rare
Frequency: Zipf frequency 2.57 in modern English
20
Scrabble Score
12
Letters
4
Syllables
10
Unique Chars
Meaning
noun
An antigen of the Rhesus system; understood unless otherwise specified to refer to Rhesus factor D (RhD), which appears on the surface of the red blood cells of most (85%) humans. An incompatibility between the Rh-blood types of a mother and her baby may cause serious disease for the baby.