Straighteners are hot flat plates that press curl out of hair. A pair of straighteners.
They work by breaking and reforming bonds in the hair, which is why the effect ends in damp weather. Straighteners used daily at high heat do real damage, which no product afterwards repairs.
1nounstraightenersHot flat plates that press curl out of hair.
“The straighteners were left on and burnt a mark into the carpet.”
straighteners is a tool.
Also accepted in games: flat iron
straightener comes from straighten + -er.
Etymology from Wiktionary, CC BY-SA