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Glite Dictionary
abactinal

abactinal

9.9
The surface or end that is opposite the mouth in animals like starfish
  • adjective
  • /ˌæbækˈtaɪnəl/
  • Specialized
translation icon : abactinal
  • The sea star's abactinal surface features numerous spines and granules.

Examples

  • The abactinal side is typically exposed to predators and the environment.

  • Researchers examined the abactinal plates to study differences among starfish species.

  • The abactinal side is often less visible.

  • The abactinal surface is fascinating!

  • Researchers examined the abactinal plates of the starfish to learn about their protective features against predators.

  • The abactinal side of the sea urchin is usually smoother and less colorful than the side with the mouth.

  • Observing the abactinal surface of the sea star revealed unique adaptations for survival in its environment.

Synonyms

aboral
vsabactinal
  • Specialized
9.9

On the side or end of an animal that is opposite the mouth

is specific to radiate animals rather than organisms in general
aborad
vsabactinal
  • Specialized
9.9

Toward the back of an animal or person away from the mouth

is limited to radiate animals and denotes the opposite surface or end

Antonyms

actinal
  • Specialized
9.9

On the side of an animal like a starfish that has the mouth

Surface Forms

abactinal positive

Morphology

abactinal = actinal (transparent) = ab + actinal

Formed by adding the prefix 'ab-' (away from) to 'actinal' (the mouth-bearing surface), so it straightforwardly denotes the side opposite the actinal surface.

Etymology

Abactinal begins with ab- meaning 'away from', and the part actinal refers to the side with the mouth. So an abactinal surface is the side 'away from the mouth', like the top of a starfish.