Tectum definitions

tĕk'təm
A rooflike structure of the body, especially the dorsal part of the midbrain.
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A rooflike structure or covering.
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A rooflike structure of the body, especially the dorsal part of the midbrain.
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(anatomy) The dorsal portion of the midbrain, containing the superior colliculus and inferior colliculus.
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The interconnected outer surface of a spore.
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Origin of tectum

From Latin tectum (“roof"), from tegō (“I cover"), cognate with Ancient Greek τέγος (tegos, “roof; any covered room of a house").