콩과에 속하는 살갈퀴의 일종으로, 고대부터 가축 사료나 식용으로 재배되어 온 식물.
A species of vetch (Vicia ervilia), also known as bitter vetch, cultivated since ancient times for animal fodder and occasionally human consumption.
예문:
"Archaeological findings indicate that ers was one of the earliest domesticated crops in the Near East."
"The farmer used ers as a high-protein fodder for his livestock during the winter months."
"Because it contains certain toxins, ers must be processed carefully before it is safe for humans to eat."