| M/3 | middle third |
|---|---|
| MCA | major coronary artery; Maternity Center Association; medical care administration; methylcholanthrene... |
| MCAO | middle cerebral artery occlusion |
| MCAS | middle cerebral artery syndrome |
| MCAT | medical college admission test; middle cerebral artery thrombosis |
| peritoneal cavity | The space enclosed by the peritoneum. It is divided into two portions, the greater sac and the lesser sac or omental bursa, which lies behind the stomach. The two sacs are connected by the foramen of winslow, or epiploic foramen. (12 Dec 1998) |
|---|---|
| perivisceral cavity | The space between the ectoderm and endoderm in the gastrula. Synonym: primitive perivisceral cavity. (05 Mar 2000) |
| roof of tympanic cavity | The superior wall, or roof, of the tympanic cavity, formed by the tegmen tympani of the temporal bone. Synonym: paries tegmentalis cavi tympani, tegmental wall of middle ear. (05 Mar 2000) |
| pharyngonasal cavity | <anatomy> The portion of the pharynx extending from the posterior nares to the level of the soft palate. (27 Sep 1997) |
| cleavage cavity | The cavity in the blastula of a developing embryo. Synonym: blastocoele, cleavage cavity, segmentation cavity. Origin: blasto-+ G. Koilos, hollow (05 Mar 2000) |
| mucosa of tympanic cavity | The mucous layer of the tympanic cavity and the structures in it. Synonym: tunica mucosa cavitatis tympani, mucous membrane of tympanic cavity. (05 Mar 2000) |
| mucous membrane of tympanic cavity | The mucous layer of the tympanic cavity and the structures in it. Synonym: tunica mucosa cavitatis tympani, mucous membrane of tympanic cavity. (05 Mar 2000) |
| pleural cavity | The potential space which lies in between the visceral pleura and the parietal pleura. (27 Sep 1997) |
| pleuroperitoneal cavity | That part of the embryonic celom later partitioned to give rise to the pleural and peritoneal cavity's. (05 Mar 2000) |
| cotyloid cavity | <anatomy> The hollow, cuplike portion of the pelvis into which the head of the thigh bone (femur) fits. <zoology> Also, in entomology, the leg socket on an insect's abdomen or thorax. (12 Mar 1998) |
| cranial cavity | <anatomy> The skull. (16 Dec 1997) |
| crown cavity | The space within the crown of a tooth continuous with the root canal. Synonym: cavitas coronalis, cavum coronale. (05 Mar 2000) |
| posterior wall of tympanic cavity | It contains the opening into the mastoid antrum. Synonym: paries mastoideus cavi tympani, mastoid wall of middle ear, posterior wall of middle ear. (05 Mar 2000) |
| head cavity | The cephalic region in the embryos of vertebrates containing the modified somites that give rise to the extrinsic eye muscles. (05 Mar 2000) |
| primitive perivisceral cavity | The space between the ectoderm and endoderm in the gastrula. Synonym: primitive perivisceral cavity. (05 Mar 2000) |