| BREATHALYSED | • breathalysed v. Simple past tense and past participle of breathalyse, an alternative spelling of breathalyze. • BREATHALYSE v. to use a device which measures the amount of alcohol on a person's breath, also BREATHALYZE. | 
| CARBOHYDRASE | • carbohydrase n. (Biochemistry) Any enzyme that catalyses the hydrolysis of polysaccharides into simple sugars. • CARBOHYDRASE n. any of a group of enzymes (as amylase) that promote hydrolysis or synthesis of a carbohydrate (as a disaccharide). | 
| DECAHYDRATES | • decahydrates n. Plural of decahydrate. • DECAHYDRATE n. a compound containing ten molecules of water of crystallization. | 
| DYNAMOGRAPHS | • dynamographs n. Plural of dynamograph. • DYNAMOGRAPH n. an instrument for recording mechanical forces. | 
| HABERDASHERY | • haberdashery n. Ribbons, buttons, thread, needles and similar sewing goods sold in a haberdasher’s shop. • haberdashery n. A shop selling such goods. • haberdashery n. A shop selling clothing and accessories for men, including hats. | 
| HEADMASTERLY | • headmasterly adj. In a manner befitting a headmaster. • HEADMASTERLY adj. like a headmaster. | 
| HEXAHYDRATES | • hexahydrates n. Plural of hexahydrate. • HEXAHYDRATE n. a chemical compound with six molecules of water. | 
| HYDRALAZINES | • hydralazines n. Plural of hydralazine. • HYDRALAZINE n. a vasodilator used in the form of its hydrochloride to treat hypertension. | 
| HYDRARGYRIAS | • HYDRARGYRIA n. mercury poisoning, also HYDRARGYRISM. | 
| HYDROMASSAGE | • hydromassage n. A therapeutic massage in which bubbles of air and jets of water are pumped through a bath in which the recipient lies. • hydromassage v. (Transitive) To massage in this way. | 
| HYRACOIDEANS | • HYRACOIDEAN n. any member of a genus of mammals including the daman and the dassie or hyrax, also HYRACOID. | 
| PACHYDERMIAS | • PACHYDERMIA n. elephantiasis. | 
| PACHYSANDRAS | • pachysandras n. Plural of pachysandra. • PACHYSANDRA n. (Greek) a Japanese tree with evergreen leaves. | 
| PARALDEHYDES | • paraldehydes n. Plural of paraldehyde. • PARALDEHYDE n. a sleep-inducing drug. | 
| PARATHYROIDS | • parathyroids n. Plural of parathyroid. • PARATHYROID n. such a gland. | 
| PARATYPHOIDS | • paratyphoids n. Plural of paratyphoid. • PARATYPHOID n. a disease resembling typhoid but caused by different bacillus. | 
| PSYCHODRAMAS | • psychodramas n. Plural of psychodrama. • PSYCHODRAMA n. therapeutic drama. | 
| RHABDOMYOMAS | • rhabdomyomas n. Plural of rhabdomyoma. • RHABDOMYOMA n. a tumour of striated muscle. | 
| SHADOWGRAPHY | • shadowgraphy n. The creation of shadowgraph images. • shadowgraphy n. The selective blocking of a light source in order to produce the silhouettes of animals, etc. as a form… • SHADOWGRAPHY n. the making of images by shadowgraph. | 
| TACHYCARDIAS | • tachycardias n. Plural of tachycardia, which can refer to types of tachycardia, cases of tachycardia, or episodes of tachycardia. • TACHYCARDIA n. quick heart-rate. |