綿 めん じょう沈殿 ちんでんじゃありませんでした
menjōchindenjārimasendeshita

Noun
Desu Copula

The polite, past negative form of 綿状沈殿

1. It was not cotton-like precipitate.; It wasn't a cottony sediment.

Past/Perfective
Negative
Polite
Terminal Form
Chemistry