Definition

The condition in which two solutions have the same concentration of solutes, resulting in no net movement of water across a semipermeable membrane.

Example

The isotonicity of the saline solution is important for patient safety during intravenous therapy.

Conversation

Have you ever heard about isotonicity in sports drinks?

Yeah, it's important for hydration, right?

Exactly! It helps maintain the right balance in our bodies.

That makes sense; I’ll pay more attention to those labels now.

Synonyms & Antonyms

Root Explanation

Isotonicity is formed from "iso-" (meaning equal) and "tonus" (from Greek, meaning tension or tone) and the suffix "-ity" (meaning the state or condition of). The word refers to the state of having equal tension or tone, particularly in relation to solutions with equal osmotic pressure.

Memory Tip

Think of 'equal' ('iso-') tension or 'tone' ('tonus') in solutions to remember that isotonicity refers to the condition of equal tension.

Visually Confused Words