Definitions beginning with M

The highest radial velocity that can be measured unambiguously by a pulsed Doppler radar. The maximum unambiguous velocity is related to the radar's successive pulses of emitted energy. When a target's velocity exceeds the maximum unambiguous velocity, the velocity will be "folded" to appear as a different velocity.
NOAA National Weather Service - Cite This Source - This Definition
Browse Related Terms: ARR, Maximum Unambiguous Range, Range Folding, TVL, VCP

In radio transmission using reflection from the regular ionized layers of the ionosphere, the upper frequency limit that can be used for transmission between two points at a specified time. Note: MUF is a median frequency applicable to 50% of the days of a month, as opposed to 90% cited for the lowest usable high frequency (LUF) and the optimum traffic frequency (FOT).
ATIS - Cite This Source - This Definition
Browse Related Terms: frequency prediction, lowest usable high frequency (LUF), LUF

The maximum rate, in bits per second, at which binary information can be transferred in a given direction between users over the telecommunications system facilities dedicated to a particular information transfer transaction, under conditions of continuous transmission and no overhead information. Note 1: For a single channel, the signaling rate is given by
where SCSR is the single-channel signaling rate in bits per second, T is the minimum time interval in seconds for which each level must be maintained, and n is the number of significant conditions of modulation of the channel. Note 2: In the case where an individual end-to-end telecommunications service is provided by parallel channels, the parallel-channel signaling rate is given by where PCSR is the total signaling rate for m channels, m is the number of parallel channels, T_i is the minimum interval between significant instants for the I-th channel, and n_i is the number of significant conditions of modulation for the I-th channel. Note 3: In the case where an end-to-end telecommunications service is provided by tandem channels, the end-to-end signaling rate is the lowest signaling rate among the component channels.
ATIS - Cite This Source - This Definition
Browse Related Terms: absolute delay, data signaling rate (DSR), head-on collision, homochronous, mesochronous, plesiochronous, significant instant, significant interval, timing jitter, wander

The highest acceptable water surface elevation with all factors affecting the safety of the structure considered. It is the highest water surface elevation resulting from a computed routing of the inflow design flood through the reservoir under established operating criteria. This surface elevation is also the top of the surcharge capacity.

Bureau of Reclamation - Cite This Source - This Definition
Browse Related Terms: Design summary, Design water level, Emergency spillway, Inflow design flood (IDF), right, Sheltering (in-place)

This signifies the highest attainable level that a convective updraft can reach; therefore, it is a good indication of how tall a thunderstorm may reach.
NOAA National Weather Service - Cite This Source - This Definition
Browse Related Terms: AGL, Engineer's Level, LVL, LVLS, Melting Level, Unsettled, Water table

A set of partial differential equations that describe and predict the behavior of electromagnetic waves in free space, in dielectrics, and at conductor-dielectric boundaries. Note: Maxwell's equations expand upon and unify the laws of Ampere, Faraday, and Gauss, and form the foundation of modern electromagnetic theory.
ATIS - Cite This Source - This Definition
Browse Related Terms: cavity, peak power output, wave equation

(may-TAN-sih-noyd DM4-KON-juh-GAY-ted HYOO-muh-nized MAH-noh-KLOH-nul AN-tee-BAH-dee...) A substance being studied in the treatment of some types of cancer. It is made by linking the monoclonal antibody huC242 to a toxic substance called maytansinoid DM4. The monoclonal antibody locates and binds to the surfaces of cancer cells and the maytansinoid DM4 enters the cells and blocks their growth. It is a type of immunotoxin. Also called huC242-DM4.
National Cancer Institute - Cite This Source - This Definition
Browse Related Terms: anti-EpCAM-Pseudomonas-exotoxin fusion protein, huC242-DM4, Proxinium, VB4-845

Abbreviation for multicast backbone on the Internet. A part of the Internet designed to support IP multicasting by coordinating the transmission of messages to a single destination instead of allowing packets to travel by different routes. [Bahorsky]
ATIS - Cite This Source - This Definition
Browse Related Terms: IP multicast, multicast address, multicast backbone (Mbone)