# blastocyst

> English word · Noun · IPA /ˈblæstəsɪst/ · frequency rank #93,474

## Definitions
1. The mammalian blastula.

## Etymology
From blasto- + cyst.

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