| DIHYDROGEN | • dihydrogen n. (Chemistry) The divalent radical formed from two separate hydrogen atoms or ions. • dihydrogen n. (Chemistry, modifying a noun) Describing a dihydrogen bond. • dihydrogen n. (Inorganic chemistry) The hydrogen molecule H2. |
| ERIOPHYIDS | • eriophyids n. Plural of eriophyid. • ERIOPHYID n. any of a large family of minute plant-feeding mites. |
| EUTHYROIDS | • euthyroids n. Plural of euthyroid. • EUTHYROID n. someone with normal thyroid function. |
| HOLIDAYERS | • holidayers n. Plural of holidayer. • HOLIDAYER n. a holidaymaker. |
| HYDROPHILE | • hydrophile n. (Chemistry) Any hydrophilic substance. • hydrophile n. (Zoology) Any organism that thrives in the presence of water. • hydrophile adj. Hydrophilic. |
| HYDROPSIES | • hydropsies n. Plural of hydropsy. • HYDROPSY n. (archaic) dropsy, also HYDROPS. |
| HYDROXIDES | • hydroxides n. Plural of hydroxide. • HYDROXIDE n. any compound containing an -OH group. |
| HYGRODEIKS | • hygrodeiks n. Plural of hygrodeik. • HYGRODEIK n. a form of hygrometer having wet and dry bulb thermometers. |
| HYPEROXIDE | • hyperoxide n. (Inorganic chemistry) Any oxide that has a higher than normal ratio of oxygen to metal. • HYPEROXIDE adj. a compound containing a relatively large proportion of oxygen. |
| HYPERPLOID | • hyperploid adj. (Genetics) Having a number of chromosomes that exceeds an exact multiple of the haploid number. • hyperploid adj. (Medicine) Having a number of chromosomes that exceeds the diploid number. • hyperploid n. A hyperploid organism. |
| HYPODERMIC | • hypodermic adj. Of, or relating to the hypodermis, the layer beneath the dermis. • hypodermic n. A hypodermic syringe, needle or injection. • HYPODERMIC adj. of or pertaining to the parts under the skin. |
| HYPODERMIS | • hypodermis n. An epidermal layer of cells that secretes an overlying chitinous cuticle, as in arthropods. • hypodermis n. (Botany) A layer of cells lying immediately below the epidermis. • hypodermis n. (Anatomy) A subcutaneous layer of loose connective tissue containing fat cells, lying beneath the dermis. |
| IDEOGRAPHY | • ideography n. The use of ideograms; logography. • IDEOGRAPHY n. the representation of ideas independently of sounds, or in an ideographic manner, as sometimes is done in shorthand writing, etc. |
| POLYHEDRIC | • polyhedric adj. Polyhedral; many-sided. • POLYHEDRIC adj. having many faces or planes, also POLYHEDRAL. |
| PREHOLIDAY | • preholiday adj. Before a holiday. • PREHOLIDAY adj. taking place before a holiday. |
| PYRETHROID | • pyrethroid n. (Organic chemistry) Any of several synthetic insecticides having a structure based on pyrethrin. • PYRETHROID n. any of various synthetic compounds related to the pyrethrins, and sharing their insecticidal properties. |
| RHYTIDOMES | • rhytidomes n. Plural of rhytidome. • RHYTIDOME n. the bark external to the last formed periderm. |