| ASTROCYTOMATA | • astrocytomata n. Plural of astrocytoma. • ASTROCYTOMA n. a tumour of the central nervous system.
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| ASTROTOURISTS | • astrotourists n. Plural of astrotourist. • ASTROTOURIST n. one who pays to visit space as a tourist.
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| AUTOROTATIONS | • autorotations n. Plural of autorotation. • AUTOROTATION n. the act of self-turning.
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| CONTRISTATION | • contristation n. The process of contristing, or making sad. • CONTRISTATION n. the act of contristing, saddening.
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| HETEROTACTOUS | • HETEROTACTOUS adj. relating to heterotaxis, the anomalous arrangement of body parts. | 
| POSTDOCTORATE | • postdoctorate adj. Postdoctoral. • postdoctorate n. Synonym of postdoc.
 • POSTDOCTORATE n. a degree after a doctorate.
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| PROSTATECTOMY | • prostatectomy n. (Surgery) The surgical removal of part or all of the prostate gland. • PROSTATECTOMY n. the surgical removal of the prostate gland.
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| PROTECTORATES | • protectorates n. Plural of protectorate. • PROTECTORATE n. an area governed by a protector.
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| PROTESTATIONS | • protestations n. Plural of protestation. • PROTESTATION n. an avowal or solemn declaration.
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| QUATTROCENTOS | • QUATTROCENTO n. (Italian) the fifteenth century in Italy; the Italian style of art, architecture, etc. of this period. | 
| STROMATOLITES | • stromatolites n. Plural of stromatolite. • STROMATOLITE n. a rounded, multilayered structure, found in rocks dating back at least 2800 million years, having present-day equivalents that result from the growth, under special conditions, of blue-green algae.
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| STROMATOLITIC | • stromatolitic adj. (Geology) Of or relating to a stromatolite. • STROMATOLITIC adj. of or like a stromatolite.
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| TERATOLOGISTS | • teratologists n. Plural of teratologist. • TERATOLOGIST n. a student of teratology.
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| TOLERATIONIST | • tolerationist n. An advocate of tolerationism. • TOLERATIONIST n. a believer in tolerationism.
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| TRACTORATIONS | • TRACTORATION n. (historical) the use of metal bars to give relief to diseased parts of the body. | 
| TROPOSCATTERS | • TROPOSCATTER n. the propagation of radio waves by using irregularities in the troposphere to scatter the signals beamed up by means of high-powered UHF transmitters and parabolic antennas. |