All articles starting with M

Motilin

Motilin is a 22-amino-acid peptide hormone secreted by M cells of the duodenal and jejunal mucosa that stimulates gastrointestinal motility; erythromycin mimics it, launching prokinetic drug development.

Motility

Motility is the capacity of an organism or cell to move independently using metabolic energy, from bacteria swimming with rotating flagella to cells crawling on actin and animals walking or flying.

Motility assay

A motility assay is a laboratory method in cell biology that measures the movement of cells or organisms, quantifying migration, chemotaxis toward a chemoattractant, and invasion through extracellular matrix.

Oct 21, 2026

Motility-associated protein Scm1

Scm1 is a 409-amino-acid motility protein of the mollicute Spiroplasma citri, identified in 1997 by Tn4001 mutagenesis; its mutant loses rotation about the helix axis, and complementation restores motility. It has no known homologues in other prokaryotes.

Motility-induced phase separation

Motility-induced phase separation, or MIPS, is a nonequilibrium phenomenon in which self-propelled particles with purely repulsive interactions separate into dense and dilute phases without any attraction.

Motion

Motion is the change in position of an object over time, described by kinematics and requiring a reference frame and quantities such as position, velocity, and acceleration.

Motion (Calvin Harris album)

Motion is Calvin Harris's fourth studio album (Fly Eye/Columbia, late 2014), the follow-up to 18 Months, with 15 tracks featuring Ellie Goulding, Gwen Stefani, Haim, Big Sean, and Tinashe; it peaked at No. 2 in the UK and No. 1 in Scotland.

Motion blur

Motion blur is the smearing of fast-moving objects across a frame, caused physically by camera exposure and artificially simulated in games, animation, and rendered imagery.

Motion capture

Motion capture, also known as mocap or motion capturing, records human or object movement and converts it into digital data, usually three-dimensional body positions and joint angles over time.

Motion City Soundtrack

Motion City Soundtrack: Minneapolis pop-punk/emo band formed 1997 by Justin Pierre and Joshua Cain, known for Moog synthesizer, gold single Everything Is Alright, and 2025 album The Same Old Wasted Wonderful World.

Motion compensation

Motion compensation is a video compression technique that predicts each frame from previously coded frames by estimating object motion, transmitting only motion vectors and residuals.

Motion detection

Motion detection is a computer vision method that identifies moving regions or objects in video by analyzing changes between frames, typically producing a binary foreground mask often converted into bounding boxes and motion alarms.

Motion detector

A motion detector, also called a motion sensor, is a sensor device that detects movement of people or objects, usually to trigger intruder alarms or switch lighting on and off.

Motion discrimination task

A motion discrimination task, or direction discrimination task, is a psychophysical paradigm in which observers judge the net direction of randomly moving dots, measuring motion sensitivity and perceptual decision-making.

Motion estimation

Motion estimation is the computer vision task of computing the displacement of image content between video frames, producing motion vectors or dense optical flow fields.

Motion forecasting

Motion forecasting is the task of predicting the future motion of traffic participants such as vehicles, pedestrians, and cyclists, letting an autonomous vehicle anticipate conflicts before they occur.

Motion interpolation

Motion interpolation, also known as motion smoothing or video frame interpolation, synthesizes new video frames between existing ones to raise a video's effective frame rate, often causing the soap opera effect on televisions.

Motion of no confidence

Motion of no confidence: a parliamentary vote withdrawing legislative majority support from a government, forcing resignation, succession, or dissolution; includes the constructive variant requiring a named successor, used in Germany, Spain, and a handful of other constitutions.

Motion Picture & Television Fund

Motion Picture & Television Fund (MPTF), founded 1921 as the Motion Picture Relief Fund by Mary Pickford and colleagues, is a California 501(c)(3) providing financial aid, health care, and retirement living to entertainment industry members, centered on the Woodland Hills Wasserman Campus.

Motion Picture Association film rating system

The MPA film rating system (G, PG, PG-13, R, NC-17) is the voluntary US movie content-labeling scheme run by CARA since November 1, 1968, when Jack Valenti replaced the Hays Production Code with parent-focused ratings.

Motion picture content rating system

Motion picture content rating system: national or industry labels (MPA G to NC-17, BBFC U to 18, Australian G to RC) indicating film content maturity and age restrictions, assigned by boards such as CARA and the Australian Classification Board.

Motion Picture Magazine

Motion Picture Magazine, launched February 1911 as The Motion Picture Story Magazine by J. Stuart Blackton of Vitagraph, was the first American movie fan magazine, retitling in 1914 and publishing monthly until 1977; it led the 1910s before Photoplay overtook it.

Motion Picture Patents Company

Motion Picture Patents Company (MPPC), the Edison "Trust": patent pool incorporated in New Jersey, September 9, 1908, by Edison and Biograph; licensed ten firms, defeated by 1915-1916 antitrust rulings, dissolved 1918-1928.

Motion Picture Sound Editors

Motion Picture Sound Editors is a professional honorary society founded in 1953. Unlike unions, it is a worldwide network welcoming artists in dialogue, ADR, sound effects, and music.

Motion planning

Motion planning is the computational problem of finding a feasible, collision-free sequence of states and control inputs that moves a robot or vehicle to a goal state.

Motion primitives

Motion primitives, also called movement or motor primitives, are parameterized, reusable units of movement from which robots compose longer behaviors, inspired by biological motor control.

Motion retargeting for teleoperation

Motion retargeting for teleoperation maps captured human hand and wrist motion onto a robot hand or arm with different kinematics, producing commands the robot can execute within its joint limits.

Motion sickness

Motion sickness (seasickness, car sickness) is nausea, vomiting, dizziness, pallor, and cold sweating from real or perceived motion conflicting vestibular, visual, and proprioceptive inputs; treated with habituation, scopolamine, and sedating antihistamines.

Motion Twin

Motion Twin is a small French video game studio based in Bordeaux, organized as a worker cooperative with equal shares, known for the 2017 hit action platformer Dead Cells.