9-letter words containing a, r, p, o
- mayorship — the chief executive official, usually elected, of a city, village, or town.
- megaspore — the larger of the two kinds of spores characteristically produced by seed plants and a few fern allies, developing into a female gametophyte. Compare microspore.
- mercapto- — (in chemical compounds) indicating the presence of an HS- group
- meropidan — any insectivorous bird of the family Meropidae
- mesocarps — Plural form of mesocarp.
- metamorph — (biology) An organism that has undergone metamorphosis.
- metaphore — Misspelling of metaphor.
- metaphors — a figure of speech in which a term or phrase is applied to something to which it is not literally applicable in order to suggest a resemblance, as in “A mighty fortress is our God.”. Compare mixed metaphor, simile (def 1).
- micro-cap — designating a company, or a mutual fund that invests in companies, with a very small market capitalization, usually under $250 million.
- micropsia — a defect of vision in which objects appear to be smaller than their actual size.
- microtape — (hardware, storage) /mi:'kroh-tayp/ Occasionally used to mean a DECtape, as opposed to a macrotape. Apparently the term "microtape" was actually the official term used within DEC for these tapes until someone coined the word "DECtape", which, of course, sounded sexier to the marketroids. Another version of the story holds that someone discovered a conflict with another company's "microtape" trademark.
- mold-warp — the common European mole, Talpa europaea.
- monocarps — Plural form of monocarp.
- monograph — a treatise on a particular subject, as a biographical study or study of the works of one artist.
- monopolar — Having a single pole.
- mopboards — Plural form of mopboard.
- mousetrap — a trap for mice, especially one consisting of a rectangular wooden base on which a metal spring is mounted.
- mouthpart — Usually, mouthparts. the appendages surrounding or associated with the mouth of arthropods.
- myatrophy — myoatrophy.
- myographs — Plural form of myograph.
- myomorpha — A major division of the rodents that includes the rats, mice, voles, hamsters, and their relatives.
- myriapods — Plural form of myriapod.
- name-drop — mention famous person to impress
- nanopores — Plural form of nanopore.
- nephogram — a photograph of a cloud
- neuropath — A person affected by nervous disease, or with an abnormally sensitive nervous system.
- nomograph — a graph, usually containing three parallel scales graduated for different variables so that when a straight line connects values of any two, the related value may be read directly from the third at the point intersected by the line.
- nonpareil — having no equal; peerless.
- nonparent — a person who is not a parent
- nonparity — the condition of having no parity; the state of not being equal
- nonparous — having borne no children.
- nonplanar — Not planar.
- nonplayer — a person that is not playing
- notepaper — writing paper, especially that used in writing notes or personal correspondence and usually less than 8½ × 11 inches (21.6 × 27.9 cm) in size.
- oil-paper — a paper made waterproof and translucent by treatment with oil.
- oleograph — a chromolithograph printed in oil colors on canvas or cloth.
- omnigraph — a device for converting Morse Code signals that are punched on a tape into audio signals, used in the training of telegraph operators.
- on parade — on display
- on parole — If a prisoner is on parole, he or she is released before the official end of their prison sentence and will not be sent back to prison if their behaviour is good.
- on patrol — monitoring an area
- ondograph — an instrument for graphically recording oscillatory variations, as in alternating currents.
- opacifier — an agent added to render something opaque
- opera hat — a man's tall, collapsible top hat, held open or in shape by springs and usually covered with a black, silky fabric. Also called gibus. Compare beaver1 (def 4), silk hat, top hat.
- operagoer — a person who attends opera performances.
- operantly — In an operant manner.
- operatics — Exaggerated or overly emotional behaviour; histrionics.
- operating — used or engaged in performing operations: an operating surgeon.
- operation — an act or instance, process, or manner of functioning or operating.
- operative — a person engaged, employed, or skilled in some branch of work, especially productive or industrial work; worker.
- operatize — to turn (a play, novel, etc) into an opera