| hatch | <ornithology> To produce young; said of eggs; to come forth from the egg; said of the young of birds, fishes, insects, etc. 1. To cross with lines in a peculiar manne in drawing and engraving. See Hatching. "Shall win this sword, silvered and hatched." (Chapman) "Those hatching strokes of the pencil." (Dryden) 2. To cross; to spot; to stain; to steep. "His weapon hatched in blood." (Beau. & Fl) Origin: F. Hacher to chop, hack. See Hash. 1. A door with an opening over it; a half door, sometimes set with spikes on the upper edge. "In at the window, or else o'er the hatch." (Shak) 2. A frame or weir in a river, for catching fish. 3. A flood gate; a a sluice gate. 4. A bedstead. 5. An opening in the deck of a vessel or floor of a warehouse which serves as a passageway or hoistway; a hatchway; also; a cover or door, or one of the covers used in closing such an opening. 6. <chemical> An opening into, or in search of, a mine. Booby hatch, Buttery hatch, Companion hatch, etc. See Booby, Buttery, etc. To batten down the hatches, to lay tarpaulins over them, and secure them with battens. To be under hatches, to be confined below in a vessel; to be under arrest, or in slavery, distress, etc. Origin: OE. Hacche, AS. Haec, cf. Haca the bar of a door, D. Hek gate, Sw. Hack coop, rack, Dan. Hekke manger, rack. Prob. Akin to E. Hook, and first used of something made of pieces fastened together. Cf. Heck, Hack a frame. Source: Websters Dictionary (01 Mar 1998) |
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| Hatch Slack Kortshak pathway | <biochemistry> Metabolic pathway responsible for primary carbon dioxide fixation in C4 plant photosynthesis. The enzymes that are found in mesophyll chloroplasts include PEP carboxylase, that adds carbon dioxide to phosphoenolpyruvate to give the 4 carbon compound, oxaloacetate. Four carbon compounds are transferred to bundle sheath chloroplasts, where the carbon dioxide is liberated and re fixed by the Calvin Benson cycle. The Hatch Slack Kortshak pathway permits efficient photosynthesis under conditions of high light intensity and low carbon dioxide concentration, avoiding the nonproductive effects of photorespiration. Acronym: HSK pathway (15 Nov 1997) |
| hatch-boat | A vessel whose deck consists almost wholly of movable hatches; used mostly in the fisheries. Source: Websters Dictionary (01 Mar 1998) |
| hatchery | A house for hatching fish, etc. Source: Websters Dictionary (01 Mar 1998) |
| hatchet | 1. A small ax with a short handle, to be used with one hand. 2. Specifically, a tomahawk. "Buried was the bloody hatchet." (Longfellow) Hatchet face, a thin, sharp face, like the edge of a hatchet; hence: Hatchet-faced, sharp-visaged. To bury the hatchet, to make peace or become reconciled. To take up the hatchet, to make or declare war. The last two phrases are derived from the practice of the American Indians. Origin: F. Hachette, dim. Of hache . See 1st Hatch, Hash. Source: Websters Dictionary (01 Mar 1998) |
| hatchet excavator | See: hatchet. (05 Mar 2000) |
| hatchettite | <chemical> Mineral t low; a waxy or spermaceti-like substance, commonly of a greenish yellow colour. Origin: Named after the discoverer, Charles Hatchett. Source: Websters Dictionary (01 Mar 1998) |
| hatching | A mode of execution in engraving, drawing, and miniature painting, in which shading is produced by lines crossing each other at angles more or less acute. Synonym: crosshatching. See: 1st Hatch. Source: Websters Dictionary (01 Mar 1998) |
| Hatchcock's sign |
tenderness on running the finger toward the angle of the jaw in mumps.
Ãâó: www.merckmedicus.com/pp/us/hcp/thcp_dorlands_conte...
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| Hatchcock's s. |
tenderness on running the finger toward the angle of the jaw in mumps.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| hatchet |
a bibeveled or single beveled cutting dental instrument having its cutting edge in line with the axis of its blade; used for breaking down tooth structures undermined by caries, for smoothing cavity walls, and for sharpening line and point angles. Called also hatchet excavator.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| hatchet e. |
hatchet.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| hatching t. |
a test for the detection of live schistosome eggs in urine or feces, dependent upon the eggs hatching to produce miracidia when placed in water; the miracidia are attracted to light and can readily be identified.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| hatch | a movable barrier covering a hatchway |
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| hatch | shading consisting of multiple crossing lines |
| hatch | the production of young from an egg |
| hatch | sit on (eggs) |
| hatch | emerge from the eggs |
| hatch | draw, cut, or engrave lines, usually parallel, on metal, wood, or paper |
| hatch | devise or invent |
| hatch | inlay with narrow strips or lines of a different substance such as gold or silver, for the purpose of decorating |
| hatch | a sloping rear car door that is lifted to open |
| hatch | a car having a hatchback door |
| hatch | a female checker |
| hatch | shaded by means of fine parallel or crossed lines |
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