# RhD

> English word · Noun · frequency rank #71,851

## Definitions
1. Rhesus factor D, an antigen in the Rhesus system.

## Etymology
From Rh, abbreviation of Rhesus, and D, a sequential alphabetic designator.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/rhd