| EIGHTEENMO | • eighteenmo n. Octodecimo (as a paper size in printing). • EIGHTEENMO n. a paper size, aka octodecimo. |
| EPHEMERONS | • EPHEMERON n. something of short lifetime. |
| EPHEMEROUS | • ephemerous adj. (Archaic) Ephemeral. • EPHEMEROUS adj. ephemeral. |
| HECTOMETER | • hectometer n. US spelling of hectometre. • HECTOMETER n. a measure of length, equal to a hundred meters, also HECTOMETRE. |
| HECTOMETRE | • hectometre n. (Metrology) An SI unit of length equal to 102 metres. Symbol: hm. • HECTOMETRE n. a measure of length, equal to a hundred meters, also HECTOMETER. |
| HEGEMONIES | • hegemonies n. Plural of hegemony. • HEGEMONY n. (Greek) leadership. |
| HELIOMETER | • heliometer n. An astronomical instrument, based on a telescope, for measuring the diameter of the sun; now used to… • HELIOMETER n. instrument for measuring apparent diameter of the sun. |
| HEMATOCELE | • hematocele n. (Pathology) A swelling caused by the collection of blood in a cavity, especially of the membrane covering a testicle. • HEMATOCELE n. a cavity containing blood, also HAEMATOCELE. |
| HEXAEMERON | • hexaemeron n. Alternative form of hexameron. • HEXAEMERON n. the (biblical) six days of creation, also HEXAHEMERON. |
| HYETOMETER | • hyetometer n. Rain gauge. • HYETOMETER n. an instrument for measuring rainfall. |
| MESOSPHERE | • mesosphere n. (Meteorology) The layer of the Earth’s atmosphere that is directly above the stratosphere and directly… • mesosphere n. (Geology) The part of the Earth’s mantle below the asthenosphere and above the outer core. • MESOSPHERE n. a zone in the Earth between 400 and 670 km below the surface separating the upper mantle from the lower mantle. |
| MOTHERESES | • MOTHERESE n. a simplified and repetitive type of speech used by adults in speaking to babies. |
| NETHERMORE | • nethermore adj. (Archaic, rare, chiefly literary) farther down; lower. • NETHERMORE n. the weaker or inferior party. |
| RHEOMETERS | • rheometers n. Plural of rheometer. • RHEOMETER n. an instrument that measures current. |
| SOMEWHENCE | • somewhence adv. (Archaic or literary) from somewhere. • SOMEWHENCE adv. from some place or other. |
| SOMEWHERES | • somewheres adj. (Nonstandard) Somewhere, in some place. • somewheres adv. (Nonstandard) Somewhere, in some place. • somewheres n. Plural of somewhere. |
| SPELEOTHEM | • speleothem n. (Geology) Any secondary mineral, deposited in a natural cave by the action of water. • SPELEOTHEM n. a term for depositional features, such as stalactites and stalagmites, found in caves, also SPELAEOTHEM. |
| THREESOMES | • threesomes n. Plural of threesome. • THREESOME n. a set of three. |