| Noun | 1. | cavity - a sizeable hole (usually in the ground); "they dug a pit to bury the body"trou-de-loup - a sloping pit with a stake in the middle used as an obstacle to the enemy barbecue pit - a pit where wood or charcoal is burned to make a bed of hot coals suitable for barbecuing meat borrow pit - a pit created to provide earth that can be used as fill at another site divot - (golf) the cavity left when a piece of turf is cut from the ground by the club head in making a stroke; "it was a good drive but the ball ended up in a divot" fire pit - a pit whose floor is incandescent lava; "the fire pit of the crater" quicksand - a pit filled with loose wet sand into which objects are sucked down sandpit - a large pit in sandy ground from which sand is dug sawpit - a pit over which lumber is positioned to be sawed by two men with a long two-handed saw tar pit - a natural accumulation of bitumens at the surface of the earth; often acts as a trap for animals whose bones are thus preserved |
| 2. | cavity - space that is surrounded by something space - an empty area (usually bounded in some way between things); "the architect left space in front of the building"; "they stopped at an open space in the jungle"; "the space between his teeth" hollow - a cavity or space in something; "hunger had caused the hollows in their cheeks" | |
| 3. | cavity - soft decayed area in a tooth; progressive decay can lead to the death of a toothdecay - the process of gradually becoming inferior | |
| 4. | cavity - (anatomy) a natural hollow or sinus within the body blastocele, blastocoel, blastocoele, cleavage cavity, segmentation cavity - the fluid-filled cavity inside a blastula archenteron - central cavity of the gastrula; becomes the intestinal or digestive cavity body, organic structure, physical structure - the entire structure of an organism (an animal, plant, or human being); "he felt as if his whole body were on fire" anatomical structure, bodily structure, body structure, complex body part, structure - a particular complex anatomical part of a living thing; "he has good bone structure" sinus - any of various air-filled cavities especially in the bones of the skull lumen - a cavity or passage in a tubular organ; "the lumen of the intestine" socket - a bony hollow into which a structure fits pulp cavity - the central cavity of a tooth containing the pulp (including the root canal) cranial orbit, eye socket, orbital cavity, orbit - the bony cavity in the skull containing the eyeball buccal cavity - the cavity between the jaws and the cheeks antrum - a natural cavity or hollow in a bone cloaca - (zoology) the cavity (in birds, reptiles, amphibians, most fish, and monotremes but not mammals) at the end of the digestive tract into which the intestinal, genital, and urinary tracts open vestibule - any of various bodily cavities leading to another cavity (as of the ear or vagina) mediastinum - the part of the thoracic cavity between the lungs that contains the heart and aorta and esophagus and trachea and thymus middle ear, tympanic cavity, tympanum - the main cavity of the ear; between the eardrum and the inner ear pleural cavity - the cavity in the thorax that contains the lungs and heart chamber - an enclosed volume in the body; "the chambers of his heart were healthy" cranial cavity, intracranial cavity - the cavity enclosed by the cranium amniotic cavity - the fluid-filled cavity that surrounds the developing embryo greater peritoneal sac, peritoneal cavity - the interior of the peritoneum; a potential space between layers of the peritoneum bursa omentalis, lesser peritoneal cavity, omental bursa - an isolated part of the peritoneal cavity that is dorsal to the stomach pericardial cavity, pericardial space - the space between the layers of the pericardium that contains fluid that lubricates the membrane surfaces and allows easy heart movement vacuole - a tiny cavity filled with fluid in the cytoplasm of a cell ventricle - one of four connected cavities in the brain; is continuous with the central canal of the spinal cord and contains cerebrospinal fluid sac - a structure resembling a bag in an animal uterine cavity - the space inside the uterus between the cervical canal and the Fallopian tubes nasal cavity - either of the two cavities lying between the floor of the cranium and the roof of the mouth and extending from the face to the pharynx nasopharynx - cavity forming the upper part of the pharynx oropharynx - cavity formed by the pharynx at the back of the mouth laryngopharynx - the lower part of the pharynx blind gut, caecum, cecum - the cavity in which the large intestine begins and into which the ileum opens; "the appendix is an offshoot of the cecum" tubular cavity - a cavity having the shape of a tube armpit, axilla, axillary cavity, axillary fossa - the hollow under the arm where it is joined to the shoulder; "they were up to their armpits in water" chest cavity, thoracic cavity - the cavity in the vertebrate body enclosed by the ribs between the diaphragm and the neck and containing the lungs and heart abdominal cavity, abdomen - the cavity containing the major viscera; in mammals it is separated from the thorax by the diaphragm renal pelvis, pelvis - a structure shaped like a funnel in the outlet of the kidney into which urine is discharged before passing into the ureter pelvic cavity - the space bounded by the bones of the pelvis and containing the pelvic viscera celom, celoma, coelom - a cavity in the mesoderm of an embryo that gives rise in humans to the pleural cavity and pericardial cavity and peritoneal cavity anatomy, general anatomy - the branch of morphology that deals with the structure of animals |