Definition

Noun: 1. A species of flowering plant in the amaranth family: Amaranthus spinosus is a specific, recognized species of annual herb. It is characterized by its erect growth habit and the presence of sharp, divergent spines at the base of most of its leaves. It is native to and commonly found in tropical regions of central Asia and Africa, though it has spread to other parts of the world.

Usage Notes

• This is a proper noun referring to a specific botanical species. Its first letter is often capitalized (), especially in scientific or formal writing, as it is a Latin binomial name (genus , species ).
• It is primarily used in scientific, agricultural, horticultural, or botanical contexts. In everyday conversation, it is commonly referred to by its common name, "spiny amaranth."

Examples of Usage

• Scientific Context:
  • The field was heavily infested with Amaranthus spinosus, which competed with the crops for nutrients.
  • Botanists are studying the drought resistance of Amaranthus spinosus.
• General/Common Name Context:
  • Be careful when weeding; that spiny amaranth has sharp thorns.
  • Some cultures use the leaves of Amaranthus spinosus as a leafy vegetable.

Advanced Usage

• In Taxonomy: The name follows the binomial nomenclature system established by Carl Linnaeus. is the genus, and is the specific epithet, meaning "spiny" in Latin, describing a key feature of the plant.

Variants and Related Words

• Common Name: Spiny amaranth, prickly amaranth, thorny amaranth.
• Related Species: (grain amaranth), (redroot pigweed), (smooth pigweed). These are different species within the same genus.

Synonyms

• Spiny amaranth (primary common name)
• Prickly amaranth
• Thorny amaranth

Different Meanings

• This term has only one specific meaning: it refers exclusively to this particular species of plant. It is not used idiomatically or in other contexts.

Noun

1. erect annual of tropical central Asia and Africa having a pair of divergent spines at most leaf nodes