| ECHOPRAXES | • ECHOPRAXIS n. in mental illness, echo-like repetition of another's actions, also ECHOPRAXIA. |
| EXOSPHERES | • exospheres n. Plural of exosphere. • EXOSPHERE n. the outermost layer of the earth's atmosphere. |
| EXOSPHERIC | • exospheric adj. Of or pertaining to an exosphere. • EXOSPHERIC adj. related to the exosphere, the outermost layer of the earth's atmosphere, also EXOSPHERICAL. |
| EXOTHERMAL | • exothermal adj. Exothermic. • EXOTHERMAL adj. of a chemical reaction, giving out heat, also EXOTHERMIC. |
| EXOTHERMIC | • exothermic adj. (Chemistry, of a reaction) That releases energy in the form of heat. • exothermic adj. (Chemistry, of a compound) That releases heat during its formation, and absorbs it during its decomposition. • exothermic adj. (Zoology) Of an animal: whose body temperature is regulated by external factors; cold-blooded. |
| HETERODOXY | • heterodoxy n. The quality of being heterodox. • heterodoxy n. A heterodox belief, creed, or teaching. • HETERODOXY n. a heterodox opinion. |
| HETEROTAXY | • heterotaxy n. (Dated) heterotaxis. • HETEROTAXY n. the abnormal disposition of organs or parts, also HETEROTAXIA. |
| HEXAEMERON | • hexaemeron n. Alternative form of hexameron. • HEXAEMERON n. the (biblical) six days of creation, also HEXAHEMERON. |
| HEXAHEDRON | • hexahedron n. (Geometry) A polyhedron with six faces. The regular hexahedron is the cube, and is one of the Platonic solids. • HEXAHEDRON n. a solid body of six sides or faces. |
| HEXAMEROUS | • hexamerous adj. (Botany) In six parts; occurring in sixes. • HEXAMEROUS adj. having six parts. |
| HORSEBOXES | • horseboxes n. Plural of horsebox. • horse␣boxes n. Plural of horse box. • HORSEBOX n. a float for carrying a horse. |
| HORSEPOXES | • HORSEPOX n. a skin disease of horses. |
| HYPEROXIDE | • hyperoxide n. (Inorganic chemistry) Any oxide that has a higher than normal ratio of oxygen to metal. • HYPEROXIDE adj. a compound containing a relatively large proportion of oxygen. |
| NEPHROPEXY | • nephropexy n. (Surgery) suspension or fixation of the kidney. • NEPHROPEXY n. the fixation of a floating kidney. |
| XEROPHILES | • xerophiles n. Plural of xerophile. • XEROPHILE n. a plant adapted to dry conditions. |
| XEROPHYTES | • xerophytes n. Plural of xerophyte. • XEROPHYTE n. a plant thriving in desert conditions. |