a simple non-flowering plant of a large group that includes the seaweeds and many single-celled forms. Algae contain chlorophyll but lack true stems, roots, leaves, and vascular tissue., a type of aquatic organism that performs photosynthesis and is found in a variety of environments, including freshwater, marine, and soil

blue-green algae, red tide algae, diatomaceous earth

Formal and Informal Expressions of algae

In different contexts, you can replace 'algae' with suitable alternatives. In a more formal setting, 'aquatic organism' is apt. In informal speech or writing, 'seaweed, pond scum' is a commonplace synonym.

algae: Explore its Definition & Usage

algae Definition

1a simple non-flowering plant of a large group that includes the seaweeds and many single-celled forms. Algae contain chlorophyll but lack true stems, roots, leaves, and vascular tissue.
2a type of aquatic organism that performs photosynthesis and is found in a variety of environments, including freshwater, marine, and soil

Using algae: Examples

Take a moment to familiarize yourself with how "algae" can be used in various situations through the following examples!

Example
The pond was covered in green algae.
Example
Seaweed is a type of algae.
Example
Algae are important producers of oxygen in aquatic ecosystems.

algae Synonyms and Antonyms

Synonyms for algae

Phrases with algae

blue-green algae
a type of bacteria that can form harmful blooms in water and produce toxins that can be dangerous to humans and animals
Example
The lake was closed due to a blue-green algae bloom.
red tide algae
a type of algae that can cause harmful algal blooms and discoloration of the water
Example
The beach was closed due to red tide algae.
diatomaceous earth
a soft, siliceous sedimentary rock that is easily crumbled into a fine white to off-white powder. It is used as a filtration aid, mild abrasive in products including metal polishes and toothpaste, mechanical insecticide, absorbent for liquids, matting agent for coatings, reinforcing filler in plastics and rubber, anti-block in plastic films, porous support for chemical catalysts, cat litter, activator in blood clotting studies, and a stabilizing component of dynamite.
Example
Diatomaceous earth is made from the fossilized remains of diatoms, a type of algae.

Origins of algae

from Latin 'alga'

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Summary: algae in Brief

'Algae' [al-jee, -jee] refers to a diverse group of aquatic organisms that perform photosynthesis and are found in various environments. They include seaweed, kelp, and phytoplankton, and are important producers of oxygen in aquatic ecosystems. Phrases like 'blue-green algae' and 'red tide algae' denote specific types of algae that can cause harmful algal blooms and discoloration of the water. 'Diatomaceous earth' is a product made from the fossilized remains of diatoms, a type of algae.