Definition

A type of star that is less bright than a main sequence star with the same temperature, often found lower on the Hertzsprung-Russell diagram.

Example

The astronomers discovered a subdwarf star that was much dimmer than the surrounding main sequence stars.

Conversation

Have you ever heard of a subdwarf star?

Yeah, I think they’re pretty interesting, especially how dim they are.

Right? I read that they have lower luminosity than main-sequence stars.

Exactly! It’s fascinating how such small stars can still exist.

Synonyms & Antonyms

Root Explanation

Subdwarf → It is formed from "sub-" (meaning under or below) and "dwarf" (from Old English "dweorh", meaning a small person or creature). The word "subdwarf" refers to a star that is smaller and less luminous than a typical dwarf star, indicating its position below the standard dwarf classification.

Memory Tip

Think of something that is 'under' ('sub-') a 'small creature' ('dwarf') — that's why subdwarf refers to a star that is smaller than a typical dwarf star.

Visually Confused Words