# HBD

> English word · Noun

## Definitions
1. Having two of the same allele at a locus, or base at an SNP, where both copies are from a single ancestor strand.

## Etymology
Abbreviation of homozygous by descent or homozygosity by descent

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