# Rollin film

> English word · Noun

## Definitions
1. A 30-nm-thick liquid film of helium in the helium II state, which exhibits a "creeping" effect in response to surfaces extending past the film's level (wave propagation) and can thus escape from open containers.

## Etymology
Named after Bernard V. Rollin.

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