Definitions

from the GNU version of the Collaborative International Dictionary of English

  • n. A lamellibranch which has three muscular scars on each valve.

from The Century Dictionary and Cyclopedia

  • Having three muscular impressions or ciboria on the inner surface of the shell, as a bivalve mollusk: correlated with monomyarian, dimyarian, etc.
  • n. A trimyarian bivalve.

Etymologies

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