| ANTIPORNOGRAPHY | • antipornography adj. Opposed to the distribution and consumption of pornography. • ANTIPORNOGRAPHY adj. opposed to pornography. |
| 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. |
| HYPERPHRYGIAN | • HYPERPHRYGIAN adj. above the Phrygian; applied to a mode of ancient Greek music having as its lower tetrachord the upper tetrachord of the Phrygian. |
| 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. |
| HYPERRESPONSIVE | • hyperresponsive adj. Involving an abnormally high degree of responsiveness. • HYPERRESPONSIVE adj. excessively responsive. |
| HYPERTROPHYING | • hypertrophying v. Present participle of hypertrophy. • HYPERTROPHY v. to grow to abnormal size. |
| PORPHYRIN | • porphyrin n. (Organic chemistry) Any of a class of heterocyclic compounds containing pyrrole rings arranged in a… • PORPHYRIN n. any of a large group of red or purple crystalline pigments present in plant and animal tissues. |
| PORPHYRINS | • porphyrins n. Plural of porphyrin. • PORPHYRIN n. any of a large group of red or purple crystalline pigments present in plant and animal tissues. |
| PORPHYROGENITE | • porphyrogenite n. (Historical) an honorific title given to a son of a reigning emperor in the Byzantine Empire, notably… • PORPHYROGENITE n. a Byzantine emperor's son, born in the purple. |
| PORPHYROGENITES | • porphyrogenites n. Plural of porphyrogenite. • PORPHYROGENITE n. a Byzantine emperor's son, born in the purple. |
| PORPHYROPSIN | • porphyropsin n. Any of a group of purple carotenoid pigments, similar to rhodopsin, in the retinas of some fish. • PORPHYROPSIN n. a purple pigment in the retinal rods of freshwater fishes that resembles rhodopsin. |
| PORPHYROPSINS | • porphyropsins n. Plural of porphyropsin. • PORPHYROPSIN n. a purple pigment in the retinal rods of freshwater fishes that resembles rhodopsin. |
| PROTOPORPHYRIN | • protoporphyrin n. (Biochemistry) Any porphyrin that lacks a central metal ion. • PROTOPORPHYRIN n. metal-free porphyrin derived from blood hemin. |
| PROTOPORPHYRINS | • protoporphyrins n. Plural of protoporphyrin. • PROTOPORPHYRIN n. metal-free porphyrin derived from blood hemin. |
| SEMIPORNOGRAPHY | • semipornography n. Material that is partly or somewhat pornographic. • SEMIPORNOGRAPHY n. material approaching the pornographic. |