12-letter words containing o, p, e, r
- interpolator — to introduce (something additional or extraneous) between other things or parts; interject; interpose; intercalate.
- interruption — an act or instance of interrupting.
- interspinous — located between spines, esp between the vertebrae
- interspousal — Often, spousals. the ceremony of marriage; nuptials.
- introspected — Simple past tense and past participle of introspect.
- introspector — to practice introspection; consider one's own internal state or feelings.
- ionophoresis — electrophoresis, esp of small ions
- ionospherist — Someone who studies the ionosphere.
- iontotherapy — (medicine) The therapeutic use of iontophoresis.
- iron pyrites — pyrite; fool's gold.
- irreciprocal — not reciprocal
- irreprovable — Not reprovable; irreproachable.
- irreprovably — in an irreprovable manner
- irresponsive — not responsive; not responding, or not responding readily, as in speech, action, or feeling.
- isoperimeter — a figure whose perimeter is equal to that of another.
- isoperimetry — the study of isoperimeters.
- isoprenaline — a compound that is a derivative of adrenaline and that is used to treat asthma and bronchial conditions. Formula: C11H17NO3
- isopropoxide — (chemistry) The univalent anion derived from isopropanol by removal of the hydroxy hydrogen atom; and salt containing this anion.
- japan clover — a drought-resistant bush clover, Lespedeza striata, of the legume family, introduced to the southern Atlantic states from Asia, having numerous tiny trifoliate leaves valued for pasturage and hay.
- japonaiserie — stylistic characteristics, as in art, decor, or film, influenced by or reflective of Japanese culture and tradition.
- jeopardising — Present participle of jeopardise.
- jeopardizing — Present participle of jeopardize.
- jeopardously — with risk or peril
- jolly jumper — any light sail set above a skysail; flying kite.
- joseph brant — Joseph (Thayendanegea) 1742–1807, Mohawk Indian chief who fought on the side of the British in the American Revolution.
- jump shooter — a player skilled at jump shots.
- jury process — the writ used to summon jurors
- keeping room — hall (def 11).
- keratoplasty — plastic surgery performed upon the cornea, especially a corneal transplantation.
- keraunograph — an instrument for recording thunderstorms by detecting the radio waves generated
- ketone group — the characteristic group occurring in ketones that consists of the carbonyl group attached to two alkyl groups.
- kinetography — a camera for taking pictures for a kinetoscope.
- kleptocratic — a government or state in which those in power exploit national resources and steal; rule by a thief or thieves.
- lactoprotein — any protein existing in milk.
- lahore party — a modern sect, divided into an older group (Qadianis) and a newer group (Lahore party)
- lampadedromy — (in ancient Greece) a relay race in which the runners or riders carried a lighted torch
- lamprophyres — Plural form of lamprophyre.
- laparoscopes — Plural form of laparoscope.
- laparotomies — Plural form of laparotomy.
- laparotomize — to perform a laparotomy on.
- laryngophone — A type of contact microphone that absorbs vibrations directly from the wearer's throat.
- laryngoscope — a rigid or flexible endoscope passed through the mouth and equipped with a source of light and magnification, for examining and performing local diagnostic and surgical procedures on the larynx.
- laser weapon — weapons which make use of lasers or lasers used as weapons
- leapfroggers — Plural form of leapfrogger.
- leapfrogging — Present participle of leapfrog.
- leopard frog — a common North American green frog, Rana pipiens, having white-edged, dark oval spots on its back.
- leopard lily — a tall lily, Lilium pardalinum, of California, having drooping, orange-red flowers with purple speckles, a yellow base, and recurved petal tips.
- leopard moth — a moth, Zeuzera pyrina, having white wings spotted with black and larvae that bore into the wood of various trees and shrubs.
- leopard seal — a yellowish-gray, spotted seal, Hydrurga leptonyx, of the Antarctic.
- leopardesses — Plural form of leopardess.