11-letter words containing a, p, e, r, i, o
- isodiaphere — one of two or more nuclides in which the difference between the number of neutrons and the number of protons is the same
- isometropia — equality of refraction in the two eyes of an individual.
- isospectral — (mathematics) Having the same spectrum.
- iteroparous — (of a plant) producing flowers and fruit more than once (usually many times) before dying
- jeopardised — Simple past tense and past participle of jeopardise.
- jeopardized — Simple past tense and past participle of jeopardize.
- jeopardizes — Third-person singular simple present indicative form of jeopardize.
- kiloparsecs — Plural form of kiloparsec.
- kinetograph — a camera for taking pictures for a kinetoscope.
- leopardskin — the skin of a leopard
- lepidoptera — the order comprising the lepidopterous insects.
- leprosarium — a hospital for the treatment of lepers.
- leptospiral — relating to, caused by, or characteristic of leptospires
- light opera — operetta.
- loop aerial — an aerial that consists of one or more coils of wire wound on a frame. Maximum radiation or reception is in the plane of the loop, the minimum occurring at right angles to it
- lower apsis — See under apsis (def 1).
- madreporian — Resembling, or pertaining to, the genus Madrepora.
- madreporite — a sievelike plate in certain echinoderms, through which water passes into the vascular system.
- mailpersons — Plural form of mailperson.
- major piece — a queen or rook.
- manila rope — rope made from Manila hemp.
- media group — an association of companies involved with the means of mass communication
- metamorphic — pertaining to or characterized by change of form, or metamorphosis.
- metanephroi — Plural form of metanephros.
- metaphorist — a creator or user of metaphors
- metaphorize — To describe something using metaphors.
- metaprotein — a hydrolytic derivative of protein, insoluble in water but soluble in dilute acids or alkalis.
- metatrophic — requiring dead organic matter for food.
- microampere — a unit of electric current, equal to one millionth of an ampere. Symbol: μA.
- microcephal — a person with microcephaly
- microphages — Plural form of microphage.
- mimeographs — Plural form of mimeograph.
- mimographer — a writer of mimes
- misanthrope — a comedy (1666) by Molière.
- narcoleptic — a condition characterized by frequent and uncontrollable periods of deep sleep.
- neanthropic — of or relating to modern forms of humans as compared with extinct species of the genus Homo.
- necrophagia — the eating of dead bodies; esp., the practice of feeding on carrion
- necrophilia — an erotic attraction to corpses.
- necrophobia — an abnormal fear of death; thanatophobia.
- negrophobia — strong fear or dislike of black people.
- neotropical — belonging or pertaining to a geographical division comprising that part of the New World extending from the tropic of Cancer southward.
- neuropathic — any diseased condition of the nervous system.
- neutropenia — a decrease in the number of neutrophils in the blood: mild, moderate, or severe neutropenia.
- nonoperatic — not operatic
- norway pine — red pine.
- office park — a complex of office buildings located on land planted with lawns, trees, bushes, etc.
- old persian — an ancient West Iranian language attested by cuneiform inscriptions. Abbreviation: OPers.
- opera seria — Italian dramatic opera of the 18th century based typically on a classical subject and characterized by extensive use of the aria da capo and recitative.
- operability — that can be treated by a surgical operation. Compare inoperable (def 2).
- operational — able to function or be used; functional: How soon will the new factory be operational?