Definition

Describing a solution that has the same concentration of dissolved substances as another solution, especially in relation to blood, which helps maintain balance in cells.

Example

The doctor recommended an isotonic solution for the patient to help with hydration.

Conversation

Hey, do you know what an isotonic drink is?

Yeah, it's supposed to help with hydration during workouts, right?

Exactly! It's interesting how it matches the body's salt levels.

For sure, I always feel better after having one when I exercise.

Synonyms & Antonyms

Root Explanation

Isotonic is formed from "iso-" (meaning equal) and "tonos" (meaning tension or tone). The word describes solutions that have the same osmotic pressure or tension, thus being equal in concentration.

Memory Tip

Think of 'iso-' meaning equal, and 'tonos' relating to tension — isotonic refers to solutions that have equal tension or concentration.

Visually Confused Words