Definition

Noun: 1. The type genus of the family Cycadaceae: A taxonomic genus comprising a group of Old World, evergreen, tropical trees. These plants are characterized by having pinnate leaves (feather-like leaves with leaflets arranged on either side of a central stem) and columnar stems that are covered with persistent bases of old leaves.

Usage Notes

• "Genus Cycas" is a scientific, botanical term used in taxonomy and biology. It is always capitalized as it is a proper noun referring to a specific genus.
• It is used to classify and refer to this particular group of cycad plants collectively.

Examples

• In scientific classification: " is the type genus for the family Cycadaceae."
• In botanical description: "The specimen belongs to , identifiable by its crown of pinnate leaves and the armor-like stem covered in old leaf bases."
• In comparative biology: "While both are cycads, plants in differ from those in genus in their geographical distribution."

Advanced Usage

• The term can be used in a more general sense to refer to the collective characteristics, evolution, or fossil record of all species within this genus.
  • Example: "The fossil record suggests genus Cycas has remained relatively unchanged for millions of years."

Variants and Related Words

• Cycas (n): The abbreviated, more common form used in scientific and horticultural contexts (e.g., " is a popular ornamental species").
• Cycad (n): The common name for plants belonging to the order Cycadales, which includes and other related genera like and .
• Cycadaceae (n): The plant family to which belongs.

Synonyms

• Type genus of Cycadaceae: This is its formal taxonomic description, not a true synonym but a defining phrase.

Different Meanings

• The word "genus" alone has a broader meaning in taxonomy, referring to a rank in biological classification that groups together closely related species. "Genus Cycas" specifies one particular instance of this rank.
• "Cycas" by itself can sometimes be used informally to refer to any plant within the genus, or as the first part of a species binomial name (e.g., ).

Noun

1. type genus of Cycadaceae: genus of widely distributed Old World evergreen tropical trees having pinnate leaves and columnar stems covered with persistent bases of old leaves