# modafinil

> English word · Noun · frequency rank #70,912

## Definitions
1. A stimulant often used in the treatment of various sleep disorders, having the chemical formula C₁₅H₁₅NO₂S

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