| CONTRAPROPELLER | • CONTRAPROPELLER n. one of a pair of propellers rotating in opposite directions. | 
| EPIPHENOMENALLY | • epiphenomenally adv. In an epiphenomenal manner. • EPIPHENOMENAL adv. of or relating to an epiphenomenon.
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| MEGASPOROPHYLLS | • megasporophylls n. Plural of megasporophyll. • MEGASPOROPHYLL n. a specialised leaf bearing or subtending one or more megasporangia.
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| MONOPROPELLANTS | • monopropellants n. Plural of monopropellant. • MONOPROPELLANT n. a rocket propellant containing both the fuel and the oxidizer in a single substance.
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| OPHTHALMOPLEGIA | • ophthalmoplegia n. (Medicine) A complete paralysis of the extraocular muscles which are responsible for eye movements. • OPHTHALMOPLEGIA n. paralysis of the ocular muscles.
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| PALAEOGRAPHICAL | • palaeographical adj. Of or pertaining to palaeography. • palæographical adj. Obsolete spelling of paleographical.
 • PALAEOGRAPHICAL adj. related to palaeography, the study of ancient writings, also PALEOGRAPHIC.
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| PALAEOPATHOLOGY | • palaeopathology n. Alternative form of paleopathology. • PALAEOPATHOLOGY n. the pathological study of the ancient remains of animals and humans.
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| PALAEOPHYTOLOGY | • palaeophytology n. Alternative form of paleophytology. • PALAEOPHYTOLOGY n. the study of fossil plants, palaeobotany.
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| PARALLELOPIPEDA | • PARALLELOPIPEDA plural of parallelopipedon* (which has sixteen letters), a solid figure bounded by six parallelograms, opposite pairs being identical and parallel. | 
| PARALLELOPIPEDS | • parallelopipeds n. Plural of parallelopiped. • PARALLELOPIPED n. a solid figure bounded by six parallelograms, opposite pairs being identical and parallel.
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| PHENOLPHTHALEIN | • phenolphthalein n. (Chemistry, pharmacology) A white or yellowish-white crystalline compound C20H14O4 used in medicine… • phenol␣phthalein n. (Chemistry) A white or yellowish-white crystalline substance made from phthalic acid and phenol. Its…
 • PHENOLPHTHALEIN n. a crystalline compound used as an indicator.
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| PLAGIOCEPHALIES | • plagiocephalies n. Plural of plagiocephaly. • PLAGIOCEPHALY n. a twisted condition of the head, the front of the skull being larger on one side, the back larger on the other.
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| POLYPHLOESBOEAN | • polyphloesboean adj. (Poetic) Loudly roaring; used to describe the ocean. • POLYPHLOESBOEAN adj. loud-roaring, also POLYPHLOISBIC.
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| PREPOSITIONALLY | • prepositionally adv. In a prepositional manner. • prepositionally adv. As a preposition.
 • PREPOSITIONAL adv. relating to a preposition.
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| PROPRIETORIALLY | • proprietorially adv. In a proprietorial manner; like an owner. • PROPRIETORIAL adv. relating to ownership.
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| PSEPHOLOGICALLY | • psephologically adv. In terms of, or by means of, psephology. • PSEPHOLOGICAL adv. related to psephology.
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