| ECHOGRAPHY | • echography n. (Medicine) The use of ultrasound as a diagnostic aid. • ECHOGRAPHY n. medical examination of the internal structures of the body by means of ultrasound. |
| HAEMOLYMPH | • haemolymph n. (British spelling) Alternative spelling of hemolymph. • HAEMOLYMPH n. the bloodlike fluid of invertebrates, also HEMOLYMPH. |
| HALOPHYTES | • halophytes n. Plural of halophyte. • HALOPHYTE n. a plant found growing in salt marshes, or in the sea. |
| HATEWORTHY | • hateworthy adj. Worthy of being hated, detestable, despicable. • HATEWORTHY adj. worthy of hate. |
| HOMEOPATHY | • homeopathy n. A system of treating diseases with small amounts of substances which, in larger amounts, would produce… • HOMEOPATHY n. the use of minute quantities of medications that in large amounts, produce symptoms like those of the disease being treated, also HOMOEOPATHY. |
| HORNYHEADS | • hornyheads n. Plural of hornyhead. • HORNYHEAD n. a North American river chub. |
| HYALOPHANE | • hyalophane n. (Mineralogy) A monoclinic crystalline mineral, a barium-rich potassium feldspar. • HYALOPHANE n. a species of the feldspar group containing barium. |
| HYDATHODES | • hydathodes n. Plural of hydathode. • HYDATHODE n. an epidermal water-excreting organ. |
| HYDROPHANE | • hydrophane n. (Mineralogy) A semitranslucent variety of opal that becomes translucent or transparent on immersion in water. • HYDROPHANE n. a semitranslucent variety of opal that becomes translucent or transparent on immersion in water. |
| HYDROTHECA | • hydrotheca n. (Zoology) One of the calicles that protect the hydranths in certain Hydroidea (Thecaphora). • HYDROTHECA n. the horny cup of a hydranth. |
| HYETOGRAPH | • hyetograph n. A graphical representation of rainfall over time. • HYETOGRAPH n. an instrument for recording rainfall. |
| HYPAETHRON | • hypaethron n. An open court. • HYPAETHRON n. an open court. |
| HYPOTHECAE | • hypothecae n. Plural of hypotheca. • HYPOTHECA n. the inner and younger layer of the cell wall of a diatom. |
| YOUTHHEADS | • YOUTHHEAD n. (obsolete) youth, also YOUNGTH, YOUTHHOOD. |