| ACETABULUM | • acetabulum n. (Anatomy) The bony cup of the pelvis which receives the head of the femur. • acetabulum n. (Zootomy) The cavity in which the leg of an insect is inserted at its articulation with the body. • acetabulum n. (Zootomy) A sucker of the sepia or cuttlefish and related animals. | 
| ALBUMINOUS | • albuminous adj. Relating to, containing, or having the properties of albumen or albumin. • ALBUMINOUS adj. of or like albumen. | 
| 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. | 
| AUTOJUMBLE | • autojumble n. (Britain) A sale of second-hand spare parts for old cars. • AUTOJUMBLE n. a jumble sale involving cars or car accessories. | 
| BURRAMUNDI | • BURRAMUNDI n. (Native Australian) any of several Australian river-fish, also BARRAMUNDA, BARRAMUNDI. | 
| MANUBRIUMS | • manubriums n. Plural of manubrium. • MANUBRIUM n. (Latin) any handle-like structure. | 
| SUBMUCOSAE | • submucosae n. Plural of submucosa. • SUBMUCOSA n. the connective tissue underlying a mucous membrane. | 
| SUBMUCOSAL | • submucosal adj. (Anatomy) Situated below or underneath the mucosal tissue. • SUBMUCOSAL adj. relating to the submucosa, the connective tissue underlying a mucous membrane. | 
| SUBMUCOSAS | • submucosas n. Plural of submucosa. • SUBMUCOSA n. the connective tissue underlying a mucous membrane. | 
| SUBSTRATUM | • substratum n. A layer that lies underneath another. • substratum n. (Figuratively) The underlying cause or basis of something. • substratum n. (Linguistics) A substrate. | 
| SUBSUMABLE | • subsumable adj. That can be subsumed. • SUBSUMABLE adj. capable of being subsumed. | 
| UMBRACULUM | • umbraculum n. (Botany) Any umbrella-shaped appendage, such as the cap borne on the seta of Marchantia. • UMBRACULUM n. (Latin) an umbrella or umbrella-like structure. | 
| UMBRAGEOUS | • umbrageous adj. Having shade; shady; having shade provided by thick foliage. • umbrageous adj. (Figuratively) Irritable, easily upset. • UMBRAGEOUS adj. shady. | 
| UNAMUSABLE | • unamusable adj. Not amusable. • UNAMUSABLE adj. not able to be amused. | 
| VIBRACULUM | • vibraculum n. (Biology) A long, whiplike, modified zooid on the surface of certain colonies of bryozoa. • VIBRACULUM n. (Latin) one of the movable, slender, spinelike organs or parts with which certain bryozoans are furnished. |