Definition of tetramerous in US English:



Zoology Botany
  • 1Having parts arranged in groups of four.

    • ‘The species are distinguished from most other tetramerous beetles, by the thickened hinder thighs, by which they are enabled to leap to a considerable height into the air.’
    • ‘The proximal aulacophore is polymerous, rather than tetramerous (as in most other stylophorans) and superficially similar to that of the earliest stylophoran, Ceratocystis.’
    • ‘The stele is divided into three parts, the tetramerous proxistele closest to the theca tapering through the mesistele to the dimerous dististele furthest from the theca.’
    • ‘The perianth of Calceolariaceae is shown to be derived from a tetramerous condition, not from pentamery as traditionally believed.’
    • ‘The genus is characterized by tetramerous flowers with bithecal anthers, lack of pseudostaminodia, a capitate or poorly defined stigma, and pollen of the Amaranthus type.’
    1. 1.1 Consisting of four joints or parts.
      • ‘They usually have umbrella-shaped bodies and tetramerous (four-part) symmetry.’