This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. the waste that remains after the minerals have been extracted from an ore by ore dressing; gangue, slimes

n. Plural form of tailing.

"So they store it in what's called tailings ponds, though the word pond hardly does them justice."

failings    mailings    railings