| HEMATOPORPHYRIN | • hematoporphyrin n. (Biochemistry) The porphyrin portion of heme (minus the iron atom). • HEMATOPORPHYRIN n. any of several porphyrins that are hydrated derivatives of protoporphyrins. |
| HYPERMETROPICAL | • hypermetropical adj. Synonym of hypermetropic. • HYPERMETROPICAL adj. longsighted, also HYPERMETROPIC. |
| HYPERPARASITISM | • hyperparasitism n. (Biology) parasitism by one parasite upon another. • HYPERPARASITISM n. the state of being a hyperparasite, a parasite that is parasitic upon another parasite. |
| HYPERPOLARISING | • hyperpolarising v. Present participle of hyperpolarise. • HYPERPOLARISE v. to increase the difference in electric potential across a cell membrane, also HYPERPOLARIZE. |
| HYPERPOLARIZING | • hyperpolarizing v. Present participle of hyperpolarize. • HYPERPOLARIZE v. to produce an increase in potential difference across a biological membrane, also HYPERPOLARISE. |
| HYPERPRODUCTION | • hyperproduction n. Excessive production. • HYPERPRODUCTION n. excessive production. |
| HYPERPRODUCTIVE | • hyperproductive adj. Exceptionally productive. |
| HYPERRESPONSIVE | • hyperresponsive adj. Involving an abnormally high degree of responsiveness. • HYPERRESPONSIVE adj. excessively responsive. |
| PEROXYSULPHURIC | • PEROXYSULPHURIC adj. as in peroxysulphuric acid. |
| PORPHYROGENITES | • porphyrogenites n. Plural of porphyrogenite. • PORPHYROGENITE n. a Byzantine emperor's son, born in the purple. |
| PTERYLOGRAPHIES | • pterylographies n. Plural of pterylography. • PTERYLOGRAPHY n. a description of pterylae. |
| PYRETOTHERAPIES | • PYRETOTHERAPY n. medical treatment by causing fever. |
| RHOMBPORPHYRIES | • RHOMBPORPHYRY n. an intermediate, moderately fine-grained igneous rock with feldspar inclusions, also RHOMBENPORPHYR, RHOMBENPORPHYRY. |
| RHYPAROGRAPHIES | • RHYPAROGRAPHY n. genre or still-life pictures of sordid subjects. |
| SEMIPORNOGRAPHY | • semipornography n. Material that is partly or somewhat pornographic. • SEMIPORNOGRAPHY n. material approaching the pornographic. |