Definition

Adjective: - Having a single cell (and thus not divided into cells): Describes an organism or life form that consists of only one cell, as opposed to being multicellular. This is a fundamental biological classification.

Usage

The adjective "one-celled" is used attributively, typically placed before a noun to describe it. It is a straightforward, descriptive term common in basic biological contexts. - It modifies nouns like organism, animal, creature, or specific biological names (e.g., amoeba).

Examples

• Attributive use:
  • Amoebas are one-celled organisms found in pond water.
  • The scientist studied various one-celled life forms under the microscope.
  • Bacteria, though simple, are complex one-celled beings.

Advanced Usage

• The term is often used in educational or introductory scientific texts to contrast with "multi-celled" or "multicellular" organisms.
• It can be hyphenated ("one-celled") or written as two words ("one celled"), though the hyphenated form is more standard, especially when used attributively before a noun.

Variants and Related Words

• Unicellular (adj): This is a more formal and precise synonym used in scientific terminology.
  • Yeast is a unicellular fungus.
• Single-celled (adj): A common variant with identical meaning.
  • Paramecium is a well-known single-celled protist.

Synonyms

• Unicellular
• Single-celled
• Acellular (Note: This can be synonymous in some contexts but may specifically refer to entities like viruses that are not composed of cells in the traditional sense.)

Antonyms

• Multicellular
• Many-celled

Adjective

1. having a single cell (and thus not divided into cells)