| oculus | (noun) the organ of sight | Synonyms: eye, optic |
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| omphalus | (noun) a scar where the umbilical cord was attached | Synonyms: belly button, bellybutton, navel, omphalos, umbilicus |
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| overplus | (noun) extreme excess | Synonyms: embarrassment, plethora, superfluity |
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| peplus | (noun) a garment worn by women in ancient Greece; cloth caught at the shoulders and draped in folds to the waist | Synonyms: peplos, peplum |
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| phallus | (noun) the male sex organ | Synonyms: member, penis |
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| pilus | (noun) hairlike structure especially on the surface of a cell or microorganism | - |
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| (noun) any of the cylindrical filaments characteristically growing from the epidermis of a mammal | Synonyms: hair |
| plus | (noun) the arithmetic operation of summing; calculating the sum of two or more numbers | Synonyms: addition, summation |
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| (noun) a useful or valuable quality | Synonyms: asset |
| plush | (noun) a fabric with a nap that is longer and softer than velvet | - |
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| precalculus | (noun) a college-level algebra and trigonometry course that is designed to prepare students for the study of calculus | Synonyms: precalc |
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| preclusion | (noun) the act of preventing something by anticipating and disposing of it effectively | Synonyms: forestalling, obviation |
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| prolusion | (noun) exercising in preparation for strenuous activity | Synonyms: tune-up, warm-up |
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| (noun) a short introductory essay preceding the text of a book | Synonyms: foreword, preface |
| pyrolusite | (noun) a mineral consisting of manganese dioxide; an important source of manganese | - |
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| recluse | (noun) one who lives in solitude | Synonyms: hermit, solitary, solitudinarian, troglodyte |
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| reclusiveness | (noun) a disposition to prefer seclusion or isolation | - |
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| rivulus | (noun) found in small streams of tropical America; often kept in aquariums; usually hermaphroditic | - |
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| sacculus | (noun) a small sac or pouch (especially the smaller chamber of the membranous labyrinth) | Synonyms: saccule |
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| seclusion | (noun) the act of secluding yourself from others | - |
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| (noun) the quality of being secluded from the presence or view of others | Synonyms: privacy, privateness |
| slush | (noun) partially melted snow | - |
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| sphacelus | (noun) the localized death of living cells (as from infection or the interruption of blood supply) | Synonyms: gangrene, mortification, necrosis |
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| (noun) necrotic tissue; a mortified or gangrenous part or mass | Synonyms: gangrene, slough |
| stimulus | (noun) any stimulating information or event; acts to arouse action | Synonyms: input, stimulant, stimulation |
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| streptobacillus | (noun) any of various rod-shaped Gram-negative bacteria | - |
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| strobilus | (noun) cone-shaped mass of ovule- or spore-bearing scales or bracts | Synonyms: cone, strobile |
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| stylus | (noun) a pointed tool for writing or drawing or engraving | Synonyms: style |
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| (noun) a sharp pointed device attached to the cartridge of a record player | - |
| surplus | (noun) a quantity much larger than is needed | Synonyms: excess, nimiety, surplusage |
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| surplusage | (noun) a quantity much larger than is needed | Synonyms: excess, nimiety, surplus |
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| talus | (noun) the bone in the ankle that articulates with the leg bones to form the ankle joint | Synonyms: anklebone, astragal, astragalus |
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| (noun) a sloping mass of loose rocks at the base of a cliff | Synonyms: scree |
| thallus | (noun) a plant body without true stems or roots or leaves or vascular system; characteristic of the thallophytes | - |
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| thiobacillus | (noun) small rod-shaped bacteria living in sewage or soil and oxidizing sulfur | - |
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| tumulus | (noun) (archeology) a heap of earth placed over prehistoric tombs | Synonyms: barrow, burial mound, grave mound |
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| utriculus | (noun) a small pouch into which the semicircular canals open | Synonyms: utricle |
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| ventriculus | (noun) thick-walled muscular pouch below the crop in many birds and reptiles for grinding food | Synonyms: gastric mill, gizzard |
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| villus | (noun) a minute hairlike projection on mucous membrane | - |
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| vitellus | (noun) nutritive material of an ovum stored for the nutrition of an embryo (especially the yellow mass of a bird or reptile egg) | Synonyms: yolk |
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| volvulus | (noun) abnormal twisting of the intestines (usually in the area of the ileum or sigmoid colon) resulting in intestinal obstruction | - |
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| wanderlust | (noun) very strong or irresistible impulse to travel | Synonyms: itchy feet |
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