Definition

Noun: * A taxonomic category: "Genus Nostoc" is the type genus of the family Nostocaceae. It refers to a specific group of freshwater, filamentous cyanobacteria (blue-green algae) characterized by their ability to form gelatinous colonies and fix atmospheric nitrogen.

Usage Notes

• "Genus Nostoc" is a scientific, taxonomic term used in biology, specifically in microbiology, phycology (the study of algae), and botany.
• It is always capitalized ("Genus ") as it is a proper noun representing a formal genus name.
• In non-scientific contexts, organisms within this genus are often simply called "nostoc" or "blue-green algae."

Examples

• Scientific Context:
  • The sample contained several species belonging to Genus Nostoc.
  • Researchers are studying the nitrogen-fixing capabilities of Genus Nostoc.
  • Under the microscope, the filaments of Genus Nostoc are clearly visible within the colonial mass.

Advanced Usage

• The term is used to discuss evolutionary relationships, ecological roles, and physiological characteristics unique to this group of organisms.
  • The phylogenetic analysis confirmed the placement of Genus Nostoc within the family Nostocaceae.

Variants and Related Words

• Nostoc (n): The common name for algae of this genus, or used informally to refer to the genus itself.
  • The pond was covered in a greenish jelly-like substance identified as nostoc.
• Nostocaceae (n): The family of cyanobacteria to which Genus Nostoc belongs.
• Cyanobacterium (n, pl. Cyanobacteria): The broader scientific term for blue-green algae, describing the phylum to which Genus Nostoc belongs.

Synonyms

• Blue-green algae (general, non-taxonomic term)
• Cyanobacteria (scientific term for the larger group)

Related Phrases / Collocations

• Nostoc colony: Refers to the visible, often spherical or amorphous, gelatinous structure formed by the algae.
• Nostoc species: Refers to the individual types within the genus, such as .
• Fix nitrogen: A key biological function performed by Genus Nostoc.

Noun

1. type genus of the family Nostocaceae: freshwater blue-green algae