| IMPOSTROUS | • impostrous adj. (Archaic) Characterized by imposture; deceitful. • IMPOSTROUS adj. doing imposture.
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| ISOPTEROUS | • isopterous adj. Having the wings equal. • ISOPTEROUS adj. relating to the Isoptera, an order of insects having the two pairs of wings closely alike.
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| ISOTROPOUS | • isotropous adj. (Archaic) isotropic. • ISOTROPOUS adj. having the same properties irrespective of direction, also ISOTROPIC.
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| OUTPROMISE | • outpromise v. (Transitive) To make more or better promises than. • OUTPROMISE v. to surpass in promising.
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| POLITBUROS | • politburos n. Plural of politburo. • POLITBURO n. (Russian) the policy-making committee in communist states.
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| POTPOURRIS | • potpourris n. Plural of potpourri. • pot-pourris n. Plural of pot-pourri.
 • pot␣pourris n. Plural of pot pourri.
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| POURPOINTS | • pourpoints n. Plural of pourpoint. • POURPOINT n. (French) a mediaeval quilted doublet.
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| PROPITIOUS | • propitious adj. Favorable; benevolent. • propitious adj. Advantageous.
 • propitious adj. Characteristic of a good omen.
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| PROPOSITUS | • propositus n. The first identified male case of an inherited disease in a family; the proband or index case. • PROPOSITUS n. (Latin) an individual to whom the family relationships of others are reckoned; specifically (a) (medicine) the first member of a family to be investigated by a researcher; (b) (law) a testator when making a will.
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| PROSCIUTTO | • prosciutto n. A dry-cured ham from Italy, thinly sliced. • PROSCIUTTO n. (Italian) aged, dry-cured Italian ham, ready to eat and usually sliced thin.
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| PROSTOMIUM | • prostomium n. (Zoology) That portion of the head of an annelid situated in front of the mouth. • PROSTOMIUM n. that portion of the head of an annelid situated in front of the mouth.
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| PROTEINOUS | • proteinous adj. Proteinaceous. • PROTEINOUS adj. of or related to protein, also PROTEINACEOUS.
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| PROTRUSION | • protrusion n. (Uncountable) The act of protruding. • protrusion n. (Uncountable) The state of being protruded.
 • protrusion n. (Countable) Anything that protrudes.
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| UPROOTINGS | • uprootings n. Plural of uprooting. • UPROOTING n. the act of uprooting.
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| UROSCOPIST | • uroscopist n. One who carries out uroscopy. • UROSCOPIST n. one who carries out a uroscopy, the diagnosis of diseases by inspection of urine.
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