All articles starting with L

Line-commutated converter

A line-commutated converter (LCC) is a power-electronic converter that changes power between AC and DC using thyristor valves, the conventional technology dominating long-distance bulk HVDC transmission.

Line-crossing ceremony

The line-crossing ceremony, also called Crossing the Line, is a naval initiation rite performed when a ship crosses the equator, with first-time crossers initiated as shellbacks.

Line-edge roughness

Line-edge roughness (LER) is the deviation of a lithographically patterned line edge from its ideal straight form, measured as rms roughness, and a growing limit in semiconductor manufacturing.

Line-of-sight propagation

Line-of-sight propagation is the transmission of radio, microwave, or optical signals along a direct, unobstructed path from transmitter to receiver, the dominant mode for microwave, satellite, and laser links.

Line-oriented flight training

Line-oriented flight training (LOFT) is a simulator-based airline training method in which a flight crew flies an uninterrupted, real-time scenario to develop coordination and decision-making.

Line-scan imaging

Line-scan imaging is a machine vision technique in which a camera captures an image one line at a time as the object moves, suiting continuous web inspection.

Line–line intersection

Line–line intersection, also called intersection of two lines, finds where two straight lines meet; parallel lines never do, and in 3D lines can be skew.

Sep 19, 2026

Linea 77

Linea 77 is an Italian nu-metal band formed in 1993 in Venaria Reale, near Turin, named for the bus line to their rehearsal room and known as the first Italian band to play Reading and Leeds.

Linea nigra

Linea nigra, the pregnancy line, is a dark vertical line of hyperpigmentation on the midline of the abdomen, occurring in over 90% of pregnancies, caused by estrogen- and progesterone-driven melanin, fading after delivery.

Lineage analysis (biology)

Lineage analysis, also called lineage tracing, is a set of methods in developmental and cell biology for reconstructing the division history and descendants of individual cells.

Lineage II (리니지 II)

Lineage II (리니지 II), also called Lineage 2, is NCSoft's fantasy MMORPG set in Aden, launched in Korea October 2003 and North America April 2004, known for open-world PvP, karma penalties, clans, and castle sieges.

Lineage Logistics

Lineage Logistics is an American real estate investment trust headquartered in Novi, Michigan, operating the world's largest temperature-controlled warehouse network, with 501 warehouses across 19 countries as of 2025.

Lineage tracing

Lineage tracing identifies all progeny of a single cell by placing a stable, inherited mark in it. Once an invertebrate embryology technique, it is now central to studying stem cell behavior in adult mammalian tissues.

LineageOS

LineageOS is a free and open-source operating system for mobile devices, based on Android and forked from CyanogenMod in 2016 after Cyanogen Inc. shut down.

Lineal championship

Lineal championship: boxing's "man who beat the man" title, a notional world championship passed only by in-ring defeat, tracing to 1880s Sullivan; distinct from WBA, WBC, IBF, WBO and Ring belts.

Lineament analysis

Lineament analysis is a remote sensing and structural geology method that maps linear surface features such as faults from satellite imagery and DEMs to infer subsurface geological structure.

Linear (software)

Linear is a web-based issue tracking and product development system for software teams, founded in 2019, known for a fast, keyboard-driven interface, and used by more than 40,000 companies.

Linear A

Linear A is the undeciphered Bronze Age logo-syllabic script of Minoan Crete, c. 1800–1450 BCE, precursor of Linear B; about 1,534 inscriptions, 97 signs, encoding the unknown Minoan language.

Linear actuator

A linear actuator is a device that creates motion in a straight line, converting energy such as motor rotation, compressed air, or hydraulic fluid into push or pull force.

Linear algebra

Linear algebra is the branch of mathematics that studies vector spaces and linear maps between them, together with the matrices, determinants, and eigenvalues used to compute with them.

Linear alkylbenzene

Linear alkylbenzene (LAB) is a family of colorless organic compounds, a benzene ring attached to a straight-chain alkyl group, made industrially as the intermediate for the biodegradable detergent surfactant linear alkylbenzene sulfonate.

Linear amplification

Linear amplification is a nucleic acid amplification method that copies templates non-exponentially to preserve relative sequence abundances, chiefly the T7-based Eberwine method reported in 1990.

Linear amplifier

A linear amplifier is an amplifier whose output faithfully reproduces its input waveform; in radio practice it uses Class A or AB operation for AM and digital signals.

Oct 21, 2026

Linear and whorled nevoid hypermelanosis

Linear and whorled nevoid hypermelanosis, or LWNH, is a rare, benign pigmentary disorder of newborns, delineated in 1988, in which streaky hyperpigmentation follows Blaschko's lines and most cases involve only the skin.

Oct 21, 2026

Linear atrophoderma of Moulin

Linear atrophoderma of Moulin (LAM), also called atrophoderma of Moulin, is a rare acquired dermatosis of hyperpigmented, atrophic band-like lesions along Blaschko's lines, first described in 1992, nonprogressive, with no proven treatment.

Linear attention

Linear attention is a family of approximations to transformer self-attention, introduced by Katharopoulos et al. in 2020, that replaces softmax with kernel feature maps to reduce computation from quadratic to linear.

Linear B

Linear B is the syllabic Bronze Age Aegean script (c. 1400-1200 BCE) used to write Mycenaean Greek, the earliest written Greek. Deciphered in 1952 by architect Michael Ventris with John Chadwick, it derives from undeciphered Linear A and records mostly palace administration on clay tablets.