All articles starting with L
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Lior Raz (ליאור רז)
Lior Raz (ליאור רז), born 1971, is an Israeli actor and screenwriter, co-creator and star (Doron Kavillio) of Fauda, co-CEO of Faraway Road Productions, with credits including Hit and Run, Operation Finale, and Gladiator II.
Lior Simon
Lior Simon is a General Partner at Cyberstarts, a cybersecurity-focused early-stage venture capital fund, having joined in 2020 after earlier roles at Sequoia Capital and Arbor Ventures.
Lior Susan
Lior Susan is an Israeli-born venture capitalist who founded Eclipse, a Palo Alto firm investing in hardware startups, and debuted on the Forbes Midas List in 2026.
LiOsO3
LiOsO3, lithium osmate, is a metallic oxide that was the first experimentally confirmed ferroelectric metal, with a polar transition below 140 K reported in 2013.
Liostrea
Liostrea (Douvillé, 1904) is an extinct gryphaeid oyster genus with Early Triassic to Cretaceous fossils; once proposed as ancestor of Gryphaea and of true oysters, now heavily revised.
Liothyronine
Liothyronine (L-T3, Cytomel) is the synthetic sodium salt of triiodothyronine, the active thyroid hormone, approved in 1956 for hypothyroidism, thyroid cancer TSH suppression, and suppression testing.
Liouville field theory
Liouville field theory is a two-dimensional conformal field theory with an exponential interaction, introduced by Polyakov in 1981 as the effective theory of two-dimensional quantum gravity.
Liouville function
The Liouville function is the completely multiplicative arithmetic function λ(n) = (−1)^Ω(n), counting prime factors with multiplicity; it is central to the prime number theorem and the Riemann hypothesis.
Liouville's theorem (Hamiltonian)
Liouville's theorem, named for Joseph Liouville, states that Hamiltonian time evolution preserves the volume of any region of phase space, so an ensemble behaves like an incompressible fluid.
Lioz Etgar
Lioz Etgar is an Israeli professor at the Hebrew University of Jerusalem who leads the Excitonic Solar Cells laboratory and is known for hole-conductor-free perovskite solar cells.
Lip
Lips (labia oris): the upper and lower tissue folds surrounding the mouth, with four surface zones including the vermilion. Key facts: facial and trigeminal nerve supply, 6th-8th week embryonic fusion, cleft lip in about 1 in 1,000-1,500 births, and uniquely human hook-shaped orbicularis oris among primates.
Lip augmentation
Lip augmentation is a cosmetic procedure that increases lip volume, shape, and definition, most commonly by injecting cross-linked hyaluronic acid filler lasting 6 to 12 months.
Lip bite test
The lip bite test is a clinical maneuver in dentistry and orthognathic surgery used to assess lip competence, whether the lips can seal at rest without visible strain.
Lip Critic
Lip Critic is a Brooklyn electropunk band formed in 2018, using two drummers, samplers, and synths instead of bass or guitars. Albums: Hex Dealer (2024) and Theft World (2026) on Partisan Records.
Lip fissure
Lip fissure (ICD-11 DA00.3) is a split or crack in the lip, spanning chapped-lip cracks, angular cheilitis fissures, and chronic lip fissures; median lip fissure is hereditary and treated by excision with Z-plasty.
Lip kiss
Lip kiss: direct mouth-to-mouth contact; the romantic-sexual kiss occurs in only 46% of 168 sampled cultures, is recorded in Mesopotamia 4,500 years ago, and may descend from ape grooming, per Bayesian phylogenetic dating.
Lip licker's dermatitis
Lip licker's dermatitis, also called lip-lick cheilitis, is irritant contact dermatitis of the lips and perioral skin caused by habitual licking and saliva's digestive enzymes, common in school-aged children, worst in winter, treated with behavior change, emollients, and topical corticosteroids or calcineurin inhibitors.
Lip plate
Lip plate (lip disc, lip plug, labret): disc or plug worn in a pierced, gradually stretched lip, worn by Mursi women of Ethiopia and Kayapó men of Brazil; plates reach 12 cm, prevalence falling.
Lip reconstruction
Lip reconstruction is the set of surgical methods used to repair full-thickness or partial defects of the upper or lower lip after trauma or, most commonly, resection of malignancy.
Lip sync
Lip sync is the alignment of mouth movement with sound in film, TV, streaming, conferencing and performance, also called sincronización labial. Tolerances span about 30 ms in live broadcast to over 100 ms in streaming; causes, standards, and AI methods differ.
Lip Sync Battle
Lip Sync Battle is an American celebrity lip-syncing competition series that premiered April 2, 2015 on Spike TV, created from Jimmy Fallon's Tonight Show segment with John Krasinski and Stephen Merchant, hosted by LL Cool J and Chrissy Teigen, and adapted in over 20 countries.
Lip-Bu Tan
Lip-Bu Tan (陈立武), also known as Tan Lip-Bu, is a Malaysian-born American venture capitalist who founded Walden International in 1987 and leads Intel as chief executive.
Lipa, Batangas
Lipa (City of Lipa) is a first-class component city in Batangas, Philippines, chartered in 1947 by RA 162. Population 387,392 (2024); historic kapeng barako coffee capital now an agro-industrial and IT-BPO hub anchored by the 740-hectare LIMA economic zone.
LIPAc
LIPAc (Linear IFMIF Prototype Accelerator) is a high-current deuteron linear accelerator under commissioning at Rokkasho, Japan, built by Europe and Japan since 2007 to validate the IFMIF fusion materials facility's accelerator design.
Lipari Energy, Inc.
Lipari Energy, Inc. was a Kentucky-based producer of thermal coal mining in Central Appalachia, listed on the Toronto Stock Exchange and taken private in 2013.
Liparidae
Liparidae, the snailfishes (Liparididae), is a family of about 460 marine teleost species in 32 genera, scaleless and jellylike, from tidepools to 8,336 m, dominating hadal trench fish faunas worldwide.
Liparis
Liparis is a large, cosmopolitan orchid genus (Orchidaceae, Malaxideae) of terrestrial and epiphytic herbs, established 1817, type species L. loeselii; molecular studies show it is polyphyletic.
Liparis liparis
Liparis liparis (Linnaeus, 1766), the striped seasnail or sea snail, a small tadpole-shaped snailfish (Liparidae) of the northeast Atlantic, 15 cm max, subtidal to about 300 m, winter-spawning, IUCN Least Concern; distinct from the orchid genus Liparis.
Liparoceras
Liparoceras is a genus of extinct ammonite cephalopods from the Early Jurassic, about 190 to 183 million years ago, with inflated, ribbed shells and two rows of tubercles.
Lipase
Lipase (EC 3.1.1.3) is a serine hydrolase that hydrolyzes triglycerides into fatty acids and glycerol, also catalyzing esterification in non-aqueous media; found in animals, plants, and microbes, with industrial uses in food, detergents, biodiesel, and pharmaceuticals.