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4 definitions found
 for Acorn
From The Collaborative International Dictionary of English v.0.48 :

  Acorn \A"corn\, n. [AS. [ae]cern, fr. [ae]cer field, acre; akin
     to D. aker acorn, Ger. ecker, Icel. akarn, Dan. agern, Goth.
     akran fruit, akrs field; -- orig. fruit of the field. See
     Acre.]
     1. The fruit of the oak, being an oval nut growing in a woody
        cup or cupule.
        [1913 Webster]
  
     2. (Naut.) A cone-shaped piece of wood on the point of the
        spindle above the vane, on the mast-head.
        [1913 Webster]
  
     3. (Zool.) See Acorn-shell.
        [1913 Webster]

From The Collaborative International Dictionary of English v.0.48 :

  Oak \Oak\ ([=o]k), n. [OE. oke, ok, ak, AS. [=a]c; akin to D.
     eik, G. eiche, OHG. eih, Icel. eik, Sw. ek, Dan. eeg.]
     [1913 Webster]
     1. (Bot.) Any tree or shrub of the genus Quercus. The oaks
        have alternate leaves, often variously lobed, and
        staminate flowers in catkins. The fruit is a smooth nut,
        called an acorn, which is more or less inclosed in a
        scaly involucre called the cup or cupule. There are now
        recognized about three hundred species, of which nearly
        fifty occur in the United States, the rest in Europe,
        Asia, and the other parts of North America, a very few
        barely reaching the northern parts of South America and
        Africa. Many of the oaks form forest trees of grand
        proportions and live many centuries. The wood is usually
        hard and tough, and provided with conspicuous medullary
        rays, forming the silver grain.
        [1913 Webster]
  
     2. The strong wood or timber of the oak.
        [1913 Webster]
  
     Note: Among the true oaks in America are:
  
     Barren oak, or
  
     Black-jack, Quercus nigra.
  
     Basket oak, Quercus Michauxii.
  
     Black oak, Quercus tinctoria; -- called also yellow oak
        or quercitron oak.
  
     Bur oak (see under Bur.), Quercus macrocarpa; -- called
        also over-cup or mossy-cup oak.
  
     Chestnut oak, Quercus Prinus and Quercus densiflora.
  
     Chinquapin oak (see under Chinquapin), Quercus
        prinoides.
  
     Coast live oak, Quercus agrifolia, of California; -- also
        called enceno.
  
     Live oak (see under Live), Quercus virens, the best of
        all for shipbuilding; also, Quercus Chrysolepis, of
        California.
  
     Pin oak. Same as Swamp oak.
  
     Post oak, Quercus obtusifolia.
  
     Red oak, Quercus rubra.
  
     Scarlet oak, Quercus coccinea.
  
     Scrub oak, Quercus ilicifolia, Quercus undulata, etc.
        
  
     Shingle oak, Quercus imbricaria.
  
     Spanish oak, Quercus falcata.
  
     Swamp Spanish oak, or
  
     Pin oak, Quercus palustris.
  
     Swamp white oak, Quercus bicolor.
  
     Water oak, Quercus aquatica.
  
     Water white oak, Quercus lyrata.
  
     Willow oak, Quercus Phellos.
        [1913 Webster] Among the true oaks in Europe are:
  
     Bitter oak, or
  
     Turkey oak, Quercus Cerris (see Cerris).
  
     Cork oak, Quercus Suber.
  
     English white oak, Quercus Robur.
  
     Evergreen oak,
  
     Holly oak, or
  
     Holm oak, Quercus Ilex.
  
     Kermes oak, Quercus coccifera.
  
     Nutgall oak, Quercus infectoria.
        [1913 Webster]
  
     Note: Among plants called oak, but not of the genus
           Quercus, are:
  
     African oak, a valuable timber tree ({Oldfieldia
        Africana).
  
     Australian oak or She oak, any tree of the genus
        Casuarina (see Casuarina).
  
     Indian oak, the teak tree (see Teak).
  
     Jerusalem oak. See under Jerusalem.
  
     New Zealand oak, a sapindaceous tree ({Alectryon
        excelsum).
  
     Poison oak, a shrub once not distinguished from poison ivy,
        but now restricted to Rhus toxicodendron or Rhus
        diversiloba.
  
     Silky oak or Silk-bark oak, an Australian tree
        ({Grevillea robusta).
        [1913 Webster]
  
     Green oak, oak wood colored green by the growth of the
        mycelium of certain fungi.
  
     Oak apple, a large, smooth, round gall produced on the
        leaves of the American red oak by a gallfly ({Cynips
        confluens). It is green and pulpy when young.
  
     Oak beauty (Zool.), a British geometrid moth ({Biston
        prodromaria) whose larva feeds on the oak.
  
     Oak gall, a gall found on the oak. See 2d Gall.
  
     Oak leather (Bot.), the mycelium of a fungus which forms
        leatherlike patches in the fissures of oak wood.
  
     Oak pruner. (Zool.) See Pruner, the insect.
  
     Oak spangle, a kind of gall produced on the oak by the
        insect Diplolepis lenticularis.
  
     Oak wart, a wartlike gall on the twigs of an oak.
  
     The Oaks, one of the three great annual English horse races
        (the Derby and St. Leger being the others). It was
        instituted in 1779 by the Earl of Derby, and so called
        from his estate.
  
     To sport one's oak, to be "not at home to visitors,"
        signified by closing the outer (oaken) door of one's
        rooms. [Cant, Eng. Univ.]
        [1913 Webster]

From WordNet (r) 3.0 (2006) :

  acorn
      n 1: fruit of the oak tree: a smooth thin-walled nut in a woody
           cup-shaped base

From The Free On-line Dictionary of Computing (18 March 2015) :

  Acorn Computers Ltd.
  acorn
  
      A UK computer manufacturer, part of the Acorn
     Computer Group plc.  Acorn was founded on 1978-12-05, on a
     kitchen table in a back room.  Their first creation was an
     electronic slot machine.  After the Acorn System 1, 2 and 3,
     Acorn launched the first commercial microcomputer - the
     ATOM in March 1980.  In April 1981, Acorn won a contract
     from the BBC to provide the PROTON.  In January 1982 Acorn
     launched the BBC Microcomputer System.  At one time, 70% of
     microcomputers bought for UK schools were BBC Micros.
  
     The Acorn Computer Group went public on the Unlisted
     Securities Market in September 1983.  In April 1984 Acorn won
     the Queen's Award for Technology for the BBC Micro and in
     September 1985 Olivetti took a controlling interest in
     Acorn.  The Master 128 Series computers were launched in
     January 1986 and the BBC Domesday System in November 1986.
  
     In 1983 Acorn began to design the Acorn RISC Machine (ARM),
     the first low-cost, high volume RISC processor chip (later
     renamed the Advanced RISC Machine).  In June 1987 they
     launched the Archimedes range - the first 32-bit RISC
     based microcomputers - which sold for under UKP 1000.  In
     February 1989 the R140 was launched.  This was the first
     Unix workstation under UKP 4000.  In May 1989 the A3000
     (the new BBC Microcomputer) was launched.
  
     In 1990 Acorn formed Advanced RISC Machines Ltd. (ARM) in
     partnership with Apple Computer, Inc. and VLSI to develop
     the ARM processor.  Acorn has continued to develop RISC
     based products.
  
     With 1992 revenues of 48.2 million pounds, Acorn Computers was
     the premier supplier of Information Technology products to
     UK education and had been the leading provider of 32-bit RISC
     based personal computers since 1987.
  
     Acorn finally folded in the late 1990s.  Their operating
     system, RISC OS was further developed by a consortium of
     suppliers.
  
     Usenet newsgroups: news:comp.sys.acorn,
     news:comp.sys.acorn.announce, news:comp.sys.acorn.tech,
     news:comp.binaries.acorn, news:comp.sources.acorn,
     news:comp.sys.acorn.advocacy, news:comp.sys.acorn.games.
  
     ftp://ftp.acorn.co.uk/)">Acorn's FTP server (ftp://ftp.acorn.co.uk/).
  
     HENSA software archive
     http://micros.hensa.ac.uk/micros/arch.html)">(http://micros.hensa.ac.uk/micros/arch.html).  Richard
     http://csv.warwick.ac.uk/~phudv/)">Birkby's Acorn page (http://csv.warwick.ac.uk/~phudv/).
     http://geko.com.au/riscman/)">RiscMan's Acorn page (http://geko.com.au/riscman/).
     http://stir.ac.uk/~rhh01/Main.html)">Acorn On The Net (http://stir.ac.uk/~rhh01/Main.html).
     "The Jungle" by Simon Truss
     http://csc.liv.ac.uk/users/u1smt/u1smt.html)">(http://csc.liv.ac.uk/users/u1smt/u1smt.html).
  
     [Recent history?]
  
     (2000-09-26)
  

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