| nidus avis | A deep depression on each side of the inferior surface of the cerebellum, between the uvula and the biventral lobe, in which the tonsil rests. Synonym: nidus hirundinis. Origin: L. Bird's nest (05 Mar 2000) |
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| calcar avis | The lower of two elevations on the medial wall of the posterior horn of the lateral ventricle of the brain, caused by the depth of the calcarine sulcus. Synonym: Haller's unguis, hippocampus minor, minor hippocampus, Morand's spur, unguis avis. (05 Mar 2000) |
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| nidus | <zoology> A nest: a repository for the eggs of birds, insects, etc.; a breeding place; especially, the place or substance where parasites or the germs of a disease effect lodgment or are developed. (06 Mar 1998) |
| nidus hirundinis | A deep depression on each side of the inferior surface of the cerebellum, between the uvula and the biventral lobe, in which the tonsil rests. Synonym: nidus hirundinis. Origin: L. Bird's nest (05 Mar 2000) |
| unguis avis | The lower of two elevations on the medial wall of the posterior horn of the lateral ventricle of the brain, caused by the depth of the calcarine sulcus. Synonym: Haller's unguis, hippocampus minor, minor hippocampus, Morand's spur, unguis avis. (05 Mar 2000) |