[hahy-druh-feyn] /ˈhaɪ drəˌfeɪn/
a partly translucent variety of opal, which becomes more translucent or transparent when immersed in water.
a white partially opaque variety of opal that becomes translucent in water
hydroxyprolinemia hy·drox·y·pro·li·ne·mi·a (hī-drŏk’sē-prō’lĭ-nē’mē-ə) n. An inherited metabolic disorder characterized by high hydroxyproline concentrations in plasma and urine and severe mental retardation.
/haɪˌdrɒksɪˈtrɪptəmiːn/ noun 1. 5-hydroxytryptamine, another name for serotonin 5HT
[hahy-drok-suh-zeen] /haɪˈdrɒk səˌzin/ noun, Pharmacology. 1. an antihistaminic compound, C 21 H 27 ClN 2 O 2 , used in the treatment of allergy, nausea, and anxiety. hydroxyzine hy·drox·y·zine (hī-drŏk’sĭ-zēn’) n. A mild sedative and minor tranquilizer used in the treatment of psychological neuroses.
[hahy-droh-zing-kahyt] /ˌhaɪ droʊˈzɪŋ kaɪt/ noun, Mineralogy. 1. a hydrous zinc carbonate, Zn 5 (CO 3) 2 (OH) 6 , an important ore of zinc in some localities.