Definition

A group of 15 chemical elements in the periodic table with atomic numbers from 57 to 71, known for their similar properties and often used in various high-tech applications.

Example

The lanthanoid elements are important in the production of strong magnets.

Conversation

Have you ever heard of a lanthanoid?

Yeah, I think it's part of the rare earth elements, right?

Exactly! They have some unique properties that are really interesting.

I read they’re used in things like smartphones and electric cars.

Synonyms & Antonyms

Root Explanation

Lanthanoid → It is formed from "lanthan" (from Greek "lanthano", meaning to be hidden) and the suffix "-oid" (meaning resembling or like). The term "lanthanoid" refers to elements that resemble lanthanum, which is derived from the idea of being hidden due to their similar properties.

Memory Tip

Think of 'lanthan' meaning 'hidden' and '-oid' meaning 'like' — so lanthanoids are elements that are like those that are hidden.

Visually Confused Words