Definition

Algaecide is a substance used to kill or control the growth of algae, which are simple, plant-like organisms that can grow in water and on surfaces.

Example

The pond was treated with an algaecide to prevent the growth of algae.

Conversation

Have you ever used algaecide in your pond?

No, I haven't tried it yet. Does it really work?

Yeah, it helps keep the water clear and free of algae.

That sounds great! I should get some for my pond too.

Synonyms & Antonyms

Root Explanation

Algaecide is formed from "algae" (from Latin *alga*, meaning seaweed or algae) and "-cide" (from Latin *caedere*, meaning to kill). The word refers to a substance that kills algae.

Memory Tip

Think of 'algae' as the plant being targeted and '-cide' meaning to kill — so an algaecide is something that kills algae.

Visually Confused Words