| AMBULACRUM | • ambulacrum n. (Of an echinoderm) A row of pores for the protrusion of appendages such as tube feet. • AMBULACRUM n. a radial band in the shell of an echinoderm, bearing rows of pores through which the tube-feet protrude. |
| COCKALORUM | • cockalorum n. (Countable) A menial yet self-important person; a person who makes empty boasts. • cockalorum n. (Uncountable) Boastful speech, crowing. • cockalorum n. (Uncountable) A game similar to leapfrog. |
| EMPLASTRUM | • EMPLASTRUM n. a medicated plaster, also EMPLASTRON. |
| EPICENTRUM | • EPICENTRUM n. the point on the Earth's surface that is directly above the focus of an earthquake, also EPICENTER, EPICENTRE. |
| EPIDENDRUM | • epidendrum n. (Botany) Any plant of the genus Epidendrum. • Epidendrum prop.n. A taxonomic genus within the family Orchidaceae – certain orchids. • EPIDENDRUM n. a genus of tropical plant, also EPIDENDRONE. |
| ERIOPHORUM | • Eriophorum prop.n. A taxonomic genus within the family Cyperaceae – cottongrass, found in acidic bogs, especially in the Arctic. • ERIOPHORUM n. a plant of the cotton-grass genus. |
| HEMELYTRUM | • hemelytrum n. Alternative form of hemelytron. • HEMELYTRUM n. an insect forewing thickened at the base, membranous at the apex, also HEMELYTRON, HEMIELYTRON. |
| INVOLUCRUM | • involucrum n. A sheath that covers or envelopes, especially one that forms around the sequestrum of new bone. • involucrum n. (Botany) An involucre. • INVOLUCRUM n. (Latin) a whorl or set of bracts around a flower, umbel, or head, also INVOLUCRE. |
| KETTLEDRUM | • kettledrum n. (Music) A large hemispherical brass percussion instrument (one of the timpani) with a drumhead that… • kettledrum n. (Dated) An informal social party at which a light collation is offered, held in the afternoon or early evening. • kettle-drum n. Alternative form of kettledrum. |
| PANJANDRUM | • panjandrum n. An important, powerful or influential person. • panjandrum n. A self-important or pretentious person. • panjandrum n. (Military) A massive, rocket-propelled, explosive-laden cart designed by the British military during World War II. |
| SEQUESTRUM | • sequestrum n. A fragment of bone or other dead tissue that has separated during necrosis. • SEQUESTRUM n. (Latin) a portion of dead bone which becomes separated from the sound portion, as in necrosis. |
| SIMULACRUM | • simulacrum n. An image or representation. • simulacrum n. A faint trace or semblance. • SIMULACRUM n. (Latin) an image, a semblance, also SIMULACRE. |
| THALICTRUM | • thalictrum n. (Botany) Any plant of the genus Thalictrum; meadowrue. • Thalictrum prop.n. A taxonomic genus within the family Ranunculaceae – the meadow rues. • THALICTRUM n. a plant of the meadow-rue genus. |
| TRIQUETRUM | • triquetrum n. (Anatomy) The triquetral bone. • triquetrum n. (Astronomy) An astronomical instrument. • TRIQUETRUM n. one of the bones of the carpus. |