| ALVEOLUS | • alveolus n. A small cavity or pit. • ALVEOLUS n. (Latin) a small body cavity, also ALVEOLE. |
| APICULUS | • apiculus n. (Mycology) The part of a spore which attaches to the sterigmata at the end of a basidium. • APICULUS n. (Latin) a sharp point at the end of a leaf. |
| BACILLUS | • bacillus n. Any of various rod-shaped, spore-forming aerobic bacteria in the genus Bacillus, some of which cause disease. • bacillus n. Any bacilliform (rod-shaped) bacterium. • bacillus n. (Figurative, by extension) Something which spreads like bacterial infection. |
| CALCULUS | • calculus n. (Dated, countable) Calculation; computation. • calculus n. (Countable, mathematics) Any formal system in which symbolic expressions are manipulated according to fixed rules. • calculus n. (Uncountable, often definite, the calculus) Differential calculus and integral calculus considered as… |
| DACTYLUS | • dactylus n. Synonym of dactyl (“type of metrical foot”). • DACTYLUS n. (Greek) the leg joint of certain insects. |
| ENTELLUS | • entellus n. A small Asian monkey (Semnopithecus entellus, syn. Presbytis entellus) having bristly hairs on the crown… • ENTELLUS n. (Latin) an East Indian long-tailed bearded monkey, remarkable for the cap-like arrangement of the hair on the head. |
| LAPILLUS | • lapillus n. A fragment of lava ejected from a volcano. • lapillus n. (Zoology) One of the otoliths in finfish. • LAPILLUS n. (Latin) a small stone ejected by volcanic eruption. |
| MODIOLUS | • modiolus n. (Anatomy) The central core of the cochlea. • modiolus n. (Anatomy) A chiasma of facial muscles held together by fibrous tissue. • Modiolus prop.n. A taxonomic genus within the family Mytilidae – horsemussel. |
| NAUTILUS | • nautilus n. A marine mollusc, of the family Nautilidae native to the Pacific Ocean and Indian Ocean, which has tentacles… • nautilus n. A kind of diving bell that sinks or rises by means of compressed air. • NAUTILUS n. (Greek) a spiral-shelled mollusk. |
| NUCELLUS | • nucellus n. (Botany) The tissue which surrounds and protects the embryo and lies inside of the integuments. • NUCELLUS n. (Latin) the mass of tissues within the integuments of a plant's ovule, containing the embryo sac. |
| OVERPLUS | • overplus n. That which remains beyond what is necessary or required; a surplus. • OVERPLUS n. a surplus. |
| PERIPLUS | • periplus n. (Literature) An account of a voyage, particularly those of Hanno and Arrian, recording ports and coastal landmarks. • periplus n. A voyage along a coast. • periplus n. (Uncommon) Synonym of circuit: the path or distance around a coast. |
| SACCULUS | • sacculus n. (Obsolete) A small bag of herbs or medicinal substances, applied to the body. • sacculus n. (Anatomy) UK form of saccule. • SACCULUS n. (Latin) a small sac, also SACCULE. |
| STIMULUS | • stimulus n. An external phenomenon that has an influence on a system, by triggering or modifying an internal phenomenon;… • stimulus n. (Physiology, psychology, medicine) Something external that elicits or influences a physiological or… • stimulus n. (Botany, entomology) A sting on the body of a plant or insect. |
| SURCULUS | • surculus n. A shoot from a rootstock; a sucker. • SURCULUS n. (Latin) a sucker. |
| TANTALUS | • tantalus n. A stork of the genus Mycteria (formerly Tantalus), especially the American wood stork, Mycteria americana. • tantalus n. A stand in which to lock up drink decanters while keeping them visible. • tantalus n. Something of an evasive or retreating nature, something consistently out of reach; a tantalising thing. |
| URCEOLUS | • urceolus n. (Botany) Any urn-shaped organ of a plant. • URCEOLUS n. (Latin) a pitcher-shaped structure, as the tube in which some rotifers live. |
| VITELLUS | • vitellus n. (Biology) The contents or substance of the ovum; egg yolk. • vitellus n. (Botany) Perisperm in an early condition. • VITELLUS n. (Latin) the yolk of an egg. |
| VOLVULUS | • volvulus n. (Medicine) Obstruction of the bowel in which a loop of bowel has abnormally twisted on itself. • VOLVULUS n. (Latin) a twisting of the intestine that causes obstruction. |