Definition

A unit of electrical resistance equal to one million ohms.

Example

The circuit has a resistance of five megohms, which is quite high.

Conversation

I was reading about electrical resistance, and I came across the term megohm.

Oh really? That's a pretty high measurement, isn't it?

Yeah, it’s like one million ohms!

Wow, I had no idea it was that much, thanks for explaining!

Synonyms & Antonyms

Root Explanation

**Megohm** → It is formed from "mega-" (from Greek *megas*, meaning great or large) and "ohm" (from German physicist Georg Simon Ohm, representing the unit of electrical resistance). The word "megohm" refers to a unit of electrical resistance equal to one million ohms, indicating a large resistance value.

Memory Tip

Think of 'mega' meaning 'great' or 'large' to remember that a megohm represents a large unit of electrical resistance.

Visually Confused Words