Liner

n. person or thing which makes lines; airplane or ship which is run by a transportation company; eye pencil, eyeliner; one who puts in linings; lining of a garment

Liner or LINER may refer to:Ocean liner, a type of modern-day passenger shipAn archaic term for ship of the line, a type of warship used from the 17th century to the 19th centuryLow-ionization nuclear emission-line region (LINER), a class of galactic nuclei (also used to refer to galaxies with such nuclei)Landfill liner, a membrane placed at the bottom of landfillsEye liner, a type of makeup
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[Image:M104 ngc4594 sombrero galaxy hi-res.jpg|right|thumb|300px|The Sombrero Galaxy (M104) as observed by the Hubble Space Telescope (HST). The Sombrero Galaxy is an example of a LINER galaxy. Credit: HST/NASA/ESA.]]A low-ionization nuclear emission-line region (LINER) is a type of galactic nucleus that is defined by its spectral line emission. The spectra typically include line emission from weakly ionized or neutral atoms, such as O, O⁺, N⁺, and S⁺. Conversely, the spectral line emission from strongly ionized atoms, such as O⁺⁺, Ne⁺⁺, and He⁺, is relatively weak. The class of galactic nuclei was first identified by Timothy Heckman in the third of a series of papers on the spectra of galactic nuclei that were published in 1980.
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Noun
1. (baseball) a hit that flies straight out from the batter; "the batter hit a liner to the shortstop"
(synonym) line drive
(hypernym) fly, fly ball
(classification) baseball, baseball game, ball
2. a piece of cloth that is used as the inside surface of a garment
(synonym) lining
(hypernym) piece of cloth, piece of material
(part-holonym) garment
(derivation) line
3. a large commercial ship (especially one that carries passengers on a regular schedule)
(synonym) ocean liner
(hypernym) passenger ship
(hyponym) cabin liner
(part-meronym) cabin

n. liner, airplane; cruise ship

n. liner