| ARSENOPYRITE | • arsenopyrite n. (Mineralogy) A silvery-grey ore of arsenic, a mixed arsenide and sulfide of iron, FeAsS. • ARSENOPYRITE n. arsenical iron pyrites. | 
| DEPRECIATORY | • depreciatory adj. Pertaining to depreciation. • DEPRECIATORY adj. tending to depreciate. | 
| ERYTHROPENIA | • erythropenia n. A decrease in the number of erythrocytes, associated with anemia. • ERYTHROPENIA n. diminution below the normal of the number of red cells in the blood. | 
| HETEROGRAPHY | • heterography n. (Countable) An incorrect spelling; a spelling different from accepted spelling. • heterography n. (Uncountable) Spelling in which a particular letter represents more than one possible sound. • HETEROGRAPHY n. incorrect spelling. | 
| HORSEPLAYERS | • horseplayers n. Plural of horseplayer. • HORSEPLAYER n. one who habitually bets on horse races. | 
| HYPERBOREANS | • hyperboreans n. Plural of hyperborean. • HYPERBOREAN n. an inhabitant of the extreme norther regions. | 
| HYPEROREXIAS | • HYPEROREXIA n. compulsive overeating. | 
| HYPERREACTOR | • hyperreactor n. One who hyperreacts. • HYPERREACTOR n. one who reacts in the extreme. | 
| KERATOPHYRES | • keratophyres n. Plural of keratophyre. • KERATOPHYRE n. a fine-grained soda trachyte. | 
| PRESERVATORY | • preservatory n. (Obsolete) A preservative. • preservatory n. (Obsolete) A room or apparatus in which perishable things can be preserved without decay. • preservatory adj. Preservative. | 
| PYRANOMETERS | • pyranometers n. Plural of pyranometer. • PYRANOMETER n. another name for a solarimeter. | 
| RECUPERATORY | • recuperatory adj. Of or relating to recuperation; tending to recovery. • RECUPERATORY adj. assisting in recuperation. | 
| STEREOGRAPHY | • stereography n. Any technique for representing solid objects in two dimensions. • stereography n. Stereoscopic photography, and the production of stereographs. • STEREOGRAPHY n. the representation of solid bodies on a plane surface. | 
| TETRAPYRROLE | • tetrapyrrole n. (Biochemistry) any of several natural pigments having a structure of four pyrrole rings connected by… • TETRAPYRROLE n. a chemical group consisting of four pyrrole rings joined either in a straight chain or in a ring, as in chlorophyll. |