| ICM | inner cell mass; integrated conditional model; intercostal margin; International Confederation of Mi... |
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| ICP-MS | inductively coupled plasma mass spectrometry [or spectrometer] |
| ID-MS | isotope dilution-mass spectrometry |
| IVM | intravascular mass |
| KERMA | kinetic energy released per unit mass |
| inner cell mass | A group of cells found in the mammalian blastocyst that give rise to the embryo and are potentially capable of forming all tissues, embryonic and extra embryonic, except the trophoblast. (18 Nov 1997) |
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| intermediate mass | The variable connection between the two thalamic masses across the third ventricle; absent in about 20% of human brains. Synonym: adhesio interthalamica, commissura cinerea, commissura grisea, intermediate mass, massa intermedia. (05 Mar 2000) |
| intradural-extramedullary mass | <radiology> Meniscus sign, neurofibroma / schwannoma, meningioma, drop metastasis, lipoma, dermoid, angioma, ependymoma of filum terminale (really intramedullary) (12 Dec 1998) |
| intramedullary mass | <radiology> Ependymoma, astrocytoma, syrinx, post-radiation myelopathy, haematoma (posttraumatic or AVM) (12 Dec 1998) |
| the large mass of the telencephalon | On either side of the midline, consisting of the cerebral cortex and its associated fibre systems, together with the deeper-lying subcortical telencephalic nuclei (i.e., basal ganglia [nuclei]). (05 Mar 2000) |
| tubular excretory mass | The mass of functioning excretory tubules of the kidney determined from the excretion of iodopyracet, or other compounds processed in the kidney primarily by tubular secretion, when large doses are used. (05 Mar 2000) |
| extradural mass | <radiology> Disc, haematoma (traumatic fracture), metastasis (epidural, bony), abscess, neurofibroma, lipoma, arachnoid cyst (12 Dec 1998) |
| unit of mass | Metric system: gram, SI: kilogram, english system: pound. (05 Mar 2000) |
| lateral mass of atlas | The thick lateral part of the atlas on each side that articulates above with the occipital condyle and below with the axis. Synonym: massa lateralis atlantis. (05 Mar 2000) |
| lateral mass of ethmoid bone | A mass of air cells with thin bony walls forming part of the lateral wall of the nasal cavity; the cells are arranged in three groups, anterior, middle, and posterior, and are closed laterally by the orbital plate which forms part of the wall of the orbit. Synonym: labyrinthus ethmoidalis, ectethmoid, ectoethmoid, lateral mass of ethmoid bone. (05 Mar 2000) |
| fourth ventricle mass | <radiology> IN ADULTS: choroid plexus papilloma, haemangioblastoma, vermian metastasis, arteriovenous malformation (AVM), inflammatory mass/cyst IN KIDS: medulloblastoma, uniform enhancement, homogeneous, ependymoma, patchy enhancement, heterogeneous, calcified (12 Dec 1998) |
| law of mass action | <chemistry> This law states that the rate of a given chemical reaction is proportional to concentration of the reactants. (09 Oct 1997) |