Hyoid arch
hyoid arch n.
The second postoral arch in the branchial arch series.
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- Hyoidean
[hahy-oid] /ˈhaɪ ɔɪd/ Anatomy, Zoology adjective 1. Also, hyoidal, hyoidean. noting or pertaining to a U -shaped bone at the root of the tongue in humans, or a corresponding bone or collection of bones in animals. noun 2. the hyoid bone. /ˈhaɪɔɪd/ adjective 1. of or relating to the hyoid bone noun 2. the horseshoe-shaped […]
- Hyolithid
[hahy-ol-i-thid] /haɪˈɒl ɪ θɪd/ noun 1. any invertebrate of the extinct genus Hyolithes, most common in the Cambrian Period, having a limy, univalve shell, and thought to be related to the pteropods. adjective 2. belonging or pertaining to Hyolithes.
- Hyoscine
[hahy-uh-seen, -sin] /ˈhaɪ əˌsin, -sɪn/ noun, Pharmacology. 1. . /ˈhaɪəˌsiːn/ noun 1. another name for scopolamine hyoscine hy·o·scine (hī’ə-sēn’) n. See scopolamine.
- Hyoscyamine
[hahy-uh-sahy-uh-meen, -min] /ˌhaɪ əˈsaɪ əˌmin, -mɪn/ noun, Pharmacology. 1. a poisonous alkaloid, C 17 H 23 NO 3 , obtained from henbane and other solanaceous plants, used as a sedative, analgesic, mydriatic, and antispasmodic. /ˌhaɪəˈsaɪəˌmiːn; -mɪn/ noun 1. a poisonous alkaloid occurring in henbane and related plants: an optically active isomer of atropine, used in […]
- Hyoscyamus
[hahy-uh-sahy-uh-muh s] /ˌhaɪ əˈsaɪ ə məs/ noun 1. the dried leaves, with or without the tops, of the henbane, Hyoscyamus niger, containing the alkaloids and scopolamine, used in medicine. /ˌhaɪəˈsaɪəməs/ noun 1. any plant of the solanaceous genus Hyoscyamus, of Europe, Asia, and N Africa, including henbane