NASAL a. 2 definitions
acterized by resonance in the nasal passage; as, a nasal vowel; a nasal utterance. Nasal bones (Anat.), two bones of the skull, in front of the frontals. -- Nasal index (Anat.), in the skull, the ratio of the transverse the base of the aperture to the nasion, which latter distance is taken as the standard, equal to 10…
NIAGARA PERIOD n.
cing the Medina, Clinton, and Niagara epoch. The rocks of the Niagara epoch, mostly limestones, are extensively distributed, and at Niagara Falls consist of about eighty feet of shale supporting a greater thickness of limestone, which is gradually undermined by the removal of the shale. See Chart of Geology.…