What is (a) A spur, or spurlike prominence. (b) A curved ridge in the floor of the leteral ventricle of the brain; the calcar avis, hippocampus minor, or ergot called?

calcar — (Anat.) (a) A spur, or spurlike prominence. (b) A curved ridge in the floor of the leteral ventricle of the brain; the calcar avis, hippocampus minor, or ergot. (Webster's 1913.)

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