# semidiurnal

> English word · Adjective

## Definitions
1. Twice daily (usually of tides).
2. Accomplished in half a day.
3. Flying in twilight.

## Etymology
From semi- + diurnal.

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