Definitions beginning with M

metallic member - permalink - collapse

All > Technology > Telecommunications

A noncommunications metallic cable component such as a shield, vapor barrier, or strength member. [T1.316-1997]
ATIS - Cite This Source - This Definition
Browse Related Terms: air-spaced coaxial cable, coax, coaxial cable (coax), filled cable, time-domain reflectometer (TDR), triaxial cable

metallic test access unit (MTAU) - permalink - collapse

All > Technology > Telecommunications

The functions associated with accessing a metallic facility for the purpose of testing. MTAU functionality may be embedded within a network element (NE) or may consist of stand-alone equipment. [T1.216-1998]
ATIS - Cite This Source - This Definition
Browse Related Terms: digital access line, digital test access unit (DTAU), intermediate element, line unit network termination (LUNT), special grade access line, wireline, wireline access

metallic voltage - permalink - collapse

All > Technology > Telecommunications

A potential difference between metallic conductors, as opposed to a potential difference between a metallic conductor and ground.
ATIS - Cite This Source - This Definition
Browse Related Terms: counterpoise, coupled bonding conductor, Fault, fortuitous conductor, metallic circuit, unbalanced line

Rock compressed or changed by pressure, heat, or water. A rock formed from a preexisting rock that is altered ("baked") by high temperatures and pressures, causing minerals to recrystallize but not melt.

Bureau of Reclamation - Cite This Source - This Definition
Browse Related Terms: Gneiss, Marble, Mica, Schist

meta name - permalink - collapse

All > Technology > Telecommunications

A meta key word that is incorporated in the head of an HTML document, and that includes the document's name and facilitates indexing for search engines. [After Bahorsky]
ATIS - Cite This Source - This Definition
Browse Related Terms: knowbot, meta, Search Engine, tree search

metaphase - permalink - collapse

All > Science > Biotechnology and Genetics > Food Biotechnology

Stage of mitosis or meiosis (following prophase and preceding anaphase ) during which the chromosome s, or at least the kinetochores, lie in the central plane of the spindle. The stage of maximum chromosome condensation, at which karyotypes are generally described. In the first division of meiosis, metaphase represents the stage at which meiotic analysis is generally performed.
UN Food and Agriculture Organization - Cite This Source - This Definition
Browse Related Terms: Centromere, colchicine, diakinesis, diplonema, leptonema, pachynema, prophase, segregation, spindle, univalent

All > Science > Biotechnology and Genetics > Human Genome

A stage in mitosis or meiosis during which the chromosomes are aligned along the equatorial plane of the cell.
Human Genome Project - Cite This Source - This Definition
The phase of mitosis, or cell division, when the chromosomes align along the center of the cell. Because metaphase chromosomes are highly condensed, scientists use these chromosomes for gene mapping and identifying chromosomal aberrations. See also cell, chromosome, gene, mapping
National Human Genome Research Institute - Cite This Source - This Definition
Browse Related Terms: Centromere, Chromomere, Chromosome painting, Chromosome region p, Chromosome region q, Nucleolar organizing region, Premature chromosome condensation (PCC), Targeted mutagenesis

All > Science > Biotechnology and Genetics > Stem Cell

A stage of mitosis where chromosomes are firmly attached to the mitotic spindle at its equator but have not yet segregated toward opposite poles.
DHHS - Cite This Source - This Definition
Browse Related Terms: aneuploid, Autosome, diploid, Diploid human cell, haploid, Karyotype, Mitosis, X inactivation, Y-chromosome

metaplasia - permalink - collapse

All > Medicine > Cancer

A change of cells to a form that does not normally occur in the tissue in which it is found.
National Cancer Institute - Cite This Source - This Definition
Browse Related Terms: Alteration, genetic marker of susceptibility, metaplastic carcinoma, modulate, necrosis, Transformation, tumor initiation, yin and yang

All > Medicine > Cancer > Breast Cancer

(meh" tuh play' shuh) a change from one type of epithelium to another.
DoD Breast Health Program South - Cite This Source - This Definition
Browse Related Terms: Apocrine Metaplasia, Duct Ectasia, Gynecomastia, lumpectomy, mastectomy, Pseudogynecomastia

metaplastic carcinoma - permalink - collapse

All > Medicine > Cancer

A general term used to describe cancer that begins in cells that have changed into another cell type (for example, a squamous cell of the esophagus changing to resemble a cell of the stomach). In some cases, metaplastic changes alone may mean there is an increased chance of cancer developing at the site.
National Cancer Institute - Cite This Source - This Definition
Browse Related Terms: Alteration, genetic marker of susceptibility, metaplasia, modulate, necrosis, Transformation, tumor initiation, yin and yang

METAR - permalink - collapse

All > Science > Weather

An international code (Aviation Routine Weather Report) used for reporting, recording and transmitting weather observations.
NOAA National Weather Service - Cite This Source - This Definition
Browse Related Terms: alert, Augmented report, Automated Report, Hail Size, MARS, Pilot Report, PIREP, Present weather, Report, RPRT

Meta Refresh - permalink - collapse

All > Technology > Search > SEO / Search Marketing

A meta tag used to make a browser refresh to another URL location. A meta refresh looks like this <meta http-equiv="refresh" content="10;url=http://www.site.com/folder/page.htm"> Generally in most cases it is preferred to use a 301 or 302 redirect over a meta refresh.
SEO Book - Cite This Source - This Definition
Browse Related Terms: 301, 302, Clickthrough, Hijacking, .htaccess, Redirect, Scraper sites

metascheduler - permalink - collapse

All > Technology > Parallel Computing > Grid Computing

A program that typically operates at a higher level than a job scheduler (typically, above the GRAM level). It schedules and submits jobs to GRAM services.

Globus Toolkit - Cite This Source - This Definition
Browse Related Terms: batch scheduler, Condor, fork, Hawkeye, job scheduler, LSF, Portable Batch System (PBS), scheduler, scheduler adapter, Scheduler Event Generator (SEG)

Meta Search - permalink - collapse

All > Technology > Search > SEO / Search Marketing

Search results derived from several sources and consolidated into a single SERP.
SEO Glossary.com - Cite This Source - This Definition
A search engine which pulls top ranked results from multiple other search engines and rearranges them into a new result set.

SEO Book - Cite This Source - This Definition
A search of searches. A query is submitted to more than one search engine or directory, and results are reported from all the engines, possibly after removal of duplicates and sorting.
I-Search Digest - Cite This Source - This Definition
Browse Related Terms: Miserable Failure, Negative SEO, Results, Search Engine Results Page (SERP), SERP, SERPs

Meta Search Engine - permalink - collapse

All > Technology > Search > SEO / Search Marketing

A server which passes queries on to many search engines and/or directories and then summarises all the results.
I-Search Digest - Cite This Source - This Definition
Browse Related Terms: Algorithm, Directory, Hilltop, Natural Language Processing, Positioning, Positioning Technique, Relevancy Algorithm, Reputation Management, Search Engine

meta-signaling VCs (vacant codes) - permalink - collapse

All > Technology > Telecommunications

The standardized vacant codes that convey meta-signaling information across a user-network interface (UNI). [T1.627-1993]
ATIS - Cite This Source - This Definition
Browse Related Terms: cable modem, fast packet switching, frame relaying protocol data unit (FPDU), registered jack (RJ), V-series Recommendations, X.-series Recommendations

metastasectomy - permalink - collapse

All > Medicine > Cancer

(meh-TAS-tuh-SEK-toh-mee) Surgery to remove one or more metastases (tumors formed from cells that have spread from the primary tumor). When all metastases are removed, it is called a complete metastasectomy.
National Cancer Institute - Cite This Source - This Definition
Browse Related Terms: bone marrow metastasis, bone metastasis, brain metastasis, CNS metastasis, complete metastasectomy, liver metastasis, lung metastasis, matrix metalloproteinase, metastases, metastasis, metastasize, metastatic, micrometastasis, nonmetastatic

metastases - permalink - collapse

All > Medicine > Cancer > Breast Cancer

When cancer spreads to another location in the body. For example, if breast cancer cells spread to the bone, this is called a "breast cancer metastasis."
CDC - Cite This Source - This Definition
Browse Related Terms: Cancer, In situ, Invasive, Malignant, stage