How to Write 铒 (ěr) — Meaning “Erbium”

Imagine that the element erbium is so rare that you need to put your 耳 (ear) close to a piece of metal 钅 to hear its faint sound. The phrase "ear metal" can help you link the pronunciation ěr to the meaning of a metal element.

Write the left side 钅 (gold radical) first: three horizontal strokes, then a vertical-hook, and finally two short strokes inside. The right side 耳 has four strokes: horizontal, vertical, horizontal, horizontal, horizontal, then vertical. A common mistake is making the right side too wide or forgetting that the last stroke of 耳 is a long vertical line.

All three characters share the metal radical 钅, but the phonetic parts differ: 铒 uses 耳 (ěr, ear), 钙 uses 丐 (gài, beggar), and 钚 uses 不 (bù, no). Visually, 铒 has the ear-like component on the right, while 钙 has a simpler shape and 钚 has a different stroke pattern. Their meanings are completely different chemical elements, so context matters.

铒 is a technical character used primarily in chemistry and materials science, such as in the terms 铒激光 (erbium laser) and 氧化铒 (erbium oxide). It appears in scientific papers and product labels rather than everyday conversation. Erbium is important in fiber optics and medical lasers, but the character itself is rare outside of specialized contexts.

Common words containing 铒 include: 铒激光 (ěr jī guāng) — Erbium laser; 氧化铒 (yǎng huà ěr) — Erbium oxide; 铒元素 (ěr yuán sù) — The element Erbium.