neon

neon — noun

1. A colourless, odourless gas that makes up a tiny fraction of the air. It stays c

1.名詞B1
釋義

A colourless, odourless gas that makes up a tiny fraction of the air. It stays chemically inactive and gives off a red-orange glow under an electric current. This gas is used in signs, lights, and certain lasers.

例句

The bright red sign above the diner was filled with neon gas.

collocation: neon gas / neon sign

Scientists use small amounts of neon in some lasers and specialised lights.

同義詞
  • inert gas

    technical category of gases including neon; not a synonym in everyday usage

文法句型

neon + noun (neon sign, neon light, neon gas)

用法筆記

Frequently used before another noun (neon sign, neon light, neon tube), where it functions similarly to adjective sense 1. The chemical symbol is Ne.

常見錯誤

The red glow in the sign comes from helium.
The red glow in the sign comes from neon.
💡Helium glows pink or pale yellow; neon produces a distinct red-orange light.
Neon reacts easily with oxygen.
Neon does not react with other elements.
💡Neon is a noble gas and is chemically inert.

neon — adjective