| ACERVULUS | • acervulus n. Synonym of corpora arenacea (calcified concretions near the pineal gland). • ACERVULUS n. (Latin) the spore-producing organ of certain fungi. |
| ANNULUSES | • annuluses n. Plural of annulus. • ANNULUS n. (Latin) a ring or ringlike part. |
| CALYCULUS | • calyculus n. (Zoology) Any cup-shaped structure. • calyculus n. (Botany, Britain) A group of bracts resembling an outer calyx. • CALYCULUS n. a small, cup-shaped structure. |
| CUMULUSES | • CUMULUS n. (Latin) a kind of cloud. |
| FLOCCULUS | • flocculus n. A small fluffy tuft. • flocculus n. (Anatomy) Either of two small lobes on the posterior border of the cerebellum. • flocculus n. (Astronomy) A marking on the surface of the sun associated with a solar prominence. |
| FUNICULUS | • funiculus n. (Anatomy) Any of several cordlike structures, especially the umbilical cord, or a bundle of nerve fibres… • funiculus n. (Botany) A stalk that connects the seed (or ovule) with the placenta. • FUNICULUS n. (Latin) the umbilical cord. |
| LIMULUSES | • LIMULUS n. (Latin) a horseshoe crab, also LIMULOID. |
| MIMULUSES | • mimuluses n. Plural of mimulus. • MIMULUS n. any of various plants of the genus Mimulus, cultivated for their yellow or red flowers. |
| PEDICULUS | • pediculus n. A louse (of the family Pediculidae), especially Pediculus humanus. • Pediculus prop.n. A taxonomic genus within the family Pediculidae – certain sucking lice. • PEDICULUS n. (Latin) any member of the louse genus. |
| REGULUSES | • reguluses n. Plural of regulus. • REGULUS n. (Latin) a mass that forms beneath the slag in a furnace. |
| RIVULUSES | • RIVULUS n. a small tropical American fish. |
| TUMULUSES | • tumuluses n. (Nonstandard) plural of tumulus. • TUMULUS n. (Latin) a mound over a grave. |
| UTRICULUS | • utriculus n. (Biology, anatomy, botany) Alternative form of utricle. • UTRICULUS n. (Latin) a saclike cavity in the inner ear, also UTRICLE. |