# backsheet

> English word · Noun

## Definitions
1. The bottom layer of a solar cell.
2. The outermost layer of a diaper or menstrual pad, made from breathable waterproof materials to prevent leakage.

## Etymology
back + sheet

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