blastoidea definition

  • noun-plural:
    • among the divisions of Crinoidea found fossil in paleozoic rocks; pentremites. They are so-named due to their particular budlike kind.
    • one of many divisions of Crinoidea discovered fossil in paleozoic stones; pentremites. These are generally so-named on account of their particular budlike type.
  • others:
    • a small grouping of fossil pelmatozoan echinoderms without arms, with ambulacra fringed for each part by pointed appendages in close connection with side-plates, which sleep on or against a subambulacral lancet-plate pierced by a canal which lodges a water-vessel, in accordance with hydrospires arranged in 10 or 8 teams restricted to the radial and inter-radial dishes.
    • a team of fossil pelmatozoan echinoderms without arms, with ambulacra fringed on each side by pointed appendages in close relation with side-plates, which rest on or against a subambulacral lancet-plate pierced by a canal which lodges a water-vessel, with hydrospires organized in 10 or 8 teams limited to the radial and inter-radial plates.
66 votes

How would you define blastoidea?

All the definitions on AZdictionary were written by people just like you. Now's your chance to add your own!