All Sources -
Updated Media sources (1) About encyclopedia.com content Print Topic
nuchal (new-kăl) adj. relating to the nape of the neck. n. fold the fold of skin at the back of the neck of the fetus. n. translucency scanning a screening test performed during pregnancy at 11 weeks of gestation that measures the thickness of the translucent area overlying the neck region of the spine of the fetus, as observed on ultrasound scanning. Increased thickness is associated with an increased risk of chromosomal abnormalities and structural (e.g. heart) defects. See also ultrasound marker.
More From encyclopedia.com
Ultraviolet Radiation , ultraviolet radiation, invisible electromagnetic radiation between visible violet light and X rays; it ranges in wavelength from about 400 to 4 nanom… Sunburn , Definition Sunburn is an inflammation of the skin caused by overexposure to ultraviolet radiation from the sun. Description Sunburn is caused by expo… Alpha-fetoprotein Test , Alpha-Fetoprotein Test Definition The alpha-fetoprotein (AFP) test is a blood test that is performed during pregnancy to screen the fetus for certain… Karst , karst / kärst/ • n. Geol. landscape underlain by limestone that has been eroded by dissolution, producing ridges, towers, fissures, sinkholes, and ot… Oriental Faunal Region , Oriental faunal region The area that encompasses India and Asia south of the Himalayan–Tibetan mountain barrier, and the Australasian archipelago, ex… N , N, n [Called ‘en’]. The 14th LETTER of the Roman ALPHABET as used for English. It originated as the Phoenician symbol nun, adopted by the Greeks as n…
You Might Also Like