| CHLOROPHYLLOID | • CHLOROPHYLLOID adj. of or like chlorophyll, also CHLOROPHYLLOUS. | 
| EDRIOPHTHALMIC | • EDRIOPHTHALMIC adj. of crustaceans, with stalkless eyes, also EDRIOPHTHALMIAN, EDRIOPHTHALMOUS. | 
| HEMISPHEROIDAL | • hemispheroidal adj. Approximating a hemisphere in shape. • HEMISPHEROIDAL adj. in the form of a half-sphere. | 
| HYDROCEPHALICS | • hydrocephalics n. Plural of hydrocephalic. • HYDROCEPHALIC n. one suffering from hydrocephaly. | 
| HYDROCEPHALIES | • hydrocephalies n. Plural of hydrocephaly. • HYDROCEPHALY n. an accumulation of serous fluid within the cranial cavity, also HYDROCEPHALUS. | 
| HYDROCEPHALOID | • hydrocephaloid adj. (Medicine) Resembling hydrocephalus. • HYDROCEPHALOID adj. suffering from hydrocephalus, an accumulation of serous fluid within the cranial cavity. | 
| HYDROCEPHALOUS | • hydrocephalous adj. Having a swollen head. • hydrocephalous adj. (Medicine) Afflicted with hydrocephalus. • HYDROCEPHALOUS adj. suffering from hydrocephaly, also HYDROCEPHALIC. | 
| HYDROGRAPHICAL | • hydrographical adj. Hydrographic. • HYDROGRAPHICAL adj. relating to hydrography, the study of bodies of water, also HYDROGRAPHIC. | 
| HYDROPHILICITY | • hydrophilicity n. (Uncountable) The condition of being hydrophilic. • hydrophilicity n. (Countable) A measure of the extent to which something is hydrophilic. • HYDROPHILICITY n. the state of being hydrophilic. | 
| HYDROSULPHATES | • hydrosulphates n. Plural of hydrosulphate. • HYDROSULPHATE n. any quaternary acid salt formed by addition of an organic base to sulphuric acid, such as aniline hydrosulphate. | 
| HYDROSULPHIDES | • hydrosulphides n. Plural of hydrosulphide. • HYDROSULPHIDE n. a compound formed by action of hydrogen sulphide on a hydroxide. | 
| HYDROSULPHITES | • hydrosulphites n. Plural of hydrosulphite. • HYDROSULPHITE n. a salt of hydrosulphurous acid; esp. the sodium salt, used as a reagent. | 
| HYDROSULPHURIC | • hydrosulphuric adj. Alternative spelling of hydrosulfuric. • HYDROSULPHURIC adj. formed by a combination of hydrogen and sulphur. | 
| ORNITHODELPHIC | • ORNITHODELPHIC adj. of or like the Ornithodelphia, monotremes, also ORNITHODELPHIAN, ORNITHODELPHOUS. | 
| PHILANTHROPOID | • philanthropoid n. (Informal) An administrative employee at a philanthropic organisation. • PHILANTHROPOID n. a person who works for a philanthropic organization. | 
| PHOSPHORYLATED | • phosphorylated v. Simple past tense and past participle of phosphorylate. • phosphorylated adj. (Chemistry) reacted or combined with phosphoric acid. • PHOSPHORYLATE v. to cause (an organic compound) to take up or combine with phosphoric acid or a phosphorus-containing group. | 
| STADHOLDERSHIP | • stadholdership n. Alternative spelling of stadtholdership. • STADHOLDERSHIP n. the office of stadholder, a Dutch viceroy or provincial governor, also STADHOLDERATE, STADTHOLDERATE, STADTHOLDERSHIP. |