| acicula | (noun) a needlelike part or structure of a plant or animal or crystal; as a spine or bristle or crystal | - |
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| alula | (noun) tuft of small stiff feathers on the first digit of a bird's wing | Synonyms: bastard wing, spurious wing |
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| (noun) scalelike structure between the base of the wing and the halter of a two-winged fly | Synonyms: calypter |
| arugula | (noun) erect European annual often grown as a salad crop to be harvested when young and tender | Synonyms: Eruca sativa, Eruca vesicaria sativa, garden rocket, rocket, rocket salad, roquette |
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| auricula | (noun) a pouch projecting from the top front of each atrium of the heart | Synonyms: auricular appendage, auricular appendix |
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| (noun) yellow-flowered primrose native to Alps; commonly cultivated | Synonyms: bear's ear, Primula auricula |
| blastula | (noun) early stage of an embryo produced by cleavage of an ovum; a liquid-filled sphere whose wall is composed of a single layer of cells; during this stage (about eight days after fertilization) implantation in the wall of the uterus occurs | Synonyms: blastosphere |
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| brotula | (noun) deep-sea fishes | - |
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| buccula | (noun) a fold of fatty tissue under the chin | Synonyms: double chin |
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| calendula | (noun) any of numerous chiefly annual herbs of the genus Calendula widely cultivated for their yellow or orange flowers; often used for medicinal and culinary purposes | - |
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| campanula | (noun) any of various plants of the genus Campanula having blue or white bell-shaped flowers | Synonyms: bellflower |
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| canafistula | (noun) deciduous or semi-evergreen tree having scented sepia to yellow flowers in drooping racemes and pods whose pulp is used medicinally; tropical Asia and Central and South America and Australia | Synonyms: canafistola, Cassia fistula, drumstick tree, golden shower tree, pudding pipe tree, purging cassia |
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| cannula | (noun) a small flexible tube inserted into a body cavity for draining off fluid or introducing medication | - |
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| capitula | (noun) a short scripture reading; done after a psalmody. | - |
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| caruncula | (noun) an outgrowth on a plant or animal such as a fowl's wattle or a protuberance near the hilum of certain seeds | Synonyms: caruncle |
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| copula | (noun) an equating verb (such as `be' or `become') that links the subject with the complement of a sentence | Synonyms: copulative, linking verb |
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| cuticula | (noun) the outer body wall of an insect | - |
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| doula | (noun) an assistant (often the father of the soon-to-be-born child) who provides support for a woman in labor by encouraging her to use techniques learned in childbirth-preparation classes | Synonyms: birthing coach, labor coach, monitrice |
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| facula | (noun) a large bright spot on the sun's photosphere occurring most frequently in the vicinity of sunspots | Synonyms: solar facula |
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| (noun) a bright spot on a planet | - |
| fecula | (noun) excreta (especially of insects) | - |
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| fibula | (noun) the outer and thinner of the two bones of the human leg between the knee and ankle | Synonyms: calf bone |
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| fistula | (noun) an abnormal passage leading from a suppurating cavity to the body surface | Synonyms: sinus |
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| (noun) a chronic inflammation of the withers of a horse | Synonyms: fistulous withers |
| formula | (noun) something regarded as a normative example | Synonyms: convention, normal, pattern, rule |
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| (noun) (mathematics) a standard procedure for solving a class of mathematical problems | Synonyms: rule |
| (noun) a group of symbols that make a mathematical statement | Synonyms: expression |
| (noun) a conventionalized statement expressing some fundamental principle | - |
| (noun) directions for making something | Synonyms: recipe |
| (noun) a representation of a substance using symbols for its constituent elements | Synonyms: chemical formula |
| (noun) a liquid food for infants | - |
| furcula | (noun) a forked bone formed by the fusion of the clavicles of most birds | - |
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| gastrula | (noun) double-walled stage of the embryo resulting from invagination of the blastula; the outer layer of cells is the ectoderm and the inner layer differentiates into the mesoderm and endoderm | - |
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| gula | (noun) eating to excess (personified as one of the deadly sins) | Synonyms: gluttony, overeating |
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| hula | (noun) a Polynesian rain dance performed by a woman | Synonyms: Hawaiian dancing, hula-hula |
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| inula | (noun) any plant of the genus Inula | - |
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| lunula | (noun) a crescent-shaped metal ornament of the Bronze Age | - |
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| (noun) the crescent-shaped area at the base of the human fingernail | Synonyms: half-moon, lunule |
| macula | (noun) a small yellowish central area of the retina that is rich in cones and that mediates clear detailed vision | Synonyms: macula lutea, macular area, yellow spot |
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| (noun) a patch of skin that is discolored but not usually elevated; caused by various diseases | Synonyms: macule |
| (noun) a cooler darker spot appearing periodically on the sun's photosphere; associated with a strong magnetic field | Synonyms: sunspot |
| mandibula | (noun) the jaw in vertebrates that is hinged to open the mouth | Synonyms: jawbone, jowl, lower jaw, lower jawbone, mandible, mandibular bone, submaxilla |
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| morula | (noun) a solid mass of blastomeres that forms when the zygote splits; develops into the blastula | - |
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| nebula | (noun) (pathology) a faint cloudy spot on the cornea | - |
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| (noun) an immense cloud of gas (mainly hydrogen) and dust in interstellar space | - |
| (noun) cloudiness of the urine | - |
| (noun) a medicinal liquid preparation intended for use in an atomizer | - |
| peninsula | (noun) a large mass of land projecting into a body of water | - |
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| pinguecula | (noun) a slightly elevated elastic tissue deposit in the conjunctiva that may extend to the cornea but does not cover it | - |
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| planula | (noun) the flat ciliated free-swimming larva of hydrozoan coelenterates | - |
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| primula | (noun) any of numerous short-stemmed plants of the genus Primula having tufted basal leaves and showy flowers clustered in umbels or heads | Synonyms: primrose |
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| pula | (noun) the basic unit of money in Botswana | - |
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| ranula | (noun) a cyst on the underside of the tongue | - |
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| roridula | (noun) either of 2 species of the genus Roridula; South African viscid perennial low-growing woody shrubs | - |
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| scapula | (noun) either of two flat triangular bones one on each side of the shoulder in human beings | Synonyms: shoulder blade, shoulder bone |
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| scrofula | (noun) a form of tuberculosis characterized by swellings of the lymphatic glands | Synonyms: king's evil, struma |
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| spatula | (noun) a hand tool with a thin flexible blade used to mix or spread soft substances | - |
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| (noun) a turner with a narrow flexible blade | - |
| spirula | (noun) a small tropical cephalopod of the genus Spirula having prominent eyes and short arms and a many-chambered shell coiled in a flat spiral | Synonyms: Spirula peronii |
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| tarantula | (noun) large hairy tropical spider with fangs that can inflict painful but not highly venomous bites | - |
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| (noun) large southern European spider once thought to be the cause of tarantism (uncontrollable bodily movement) | Synonyms: European wolf spider, Lycosa tarentula |
| trabecula | (noun) rod-shaped structures of fibrous tissue that divide an organ into parts (as in the penis) or stabilize the structure of an organ (as in the spleen) | - |
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| uvula | (noun) a small pendant fleshy lobe at the back of the soft palate | - |
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| vallecula | (noun) (anatomy) any furrow or channel on a bodily structure or part | Synonyms: groove |
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| valvula | (noun) a small valve | Synonyms: valvelet, valvule |
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| venula | (noun) a minute vein continuous with a capillary | Synonyms: capillary vein, venule |
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| zonula | (noun) small beltlike zone | Synonyms: zonule |
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