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bulb

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bulb


  3  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Bulb  \Bulb\,  v.  i. 
  To  take  the  shape  of  a  bulb;  to  swell. 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Bulb  \Bulb\  (b[u^]lb),  n.  [L.  bulbus,  Gr  bolbo`s:  cf  F. 
  bulbe.] 
  1.  (Bot.)  A  spheroidal  body  growing  from  a  plant  either  above 
  or  below  the  ground  (usually  below),  which  is  strictly  a 
  bud,  consisting  of  a  cluster  of  partially  developed 
  leaves,  and  producing,  as  it  grows,  a  stem  above,  and 
  roots  below,  as  in  the  onion,  tulip,  etc  It  differs  from 
  a  corm  in  not  being  solid. 
 
  2.  (Anat.)  A  name  given  to  some  parts  that  resemble  in  shape 
  certain  bulbous  roots;  as  the  bulb  of  the  aorta. 
 
  {Bulb  of  the  eye},  the  eyeball. 
 
  {Bulb  of  a  hair},  the  ``root,''  or  part  whence  the  hair 
  originates. 
 
  {Bulb  of  the  spinal  cord},  the  medulla  oblongata,  often 
  called  simply  bulb. 
 
  {Bulb  of  a  tooth},  the  vascular  and  nervous  papilla  contained 
  in  the  cavity  of  the  tooth. 
 
  3.  An  expansion  or  protuberance  on  a  stem  or  tube,  as  the 
  bulb  of  a  thermometer,  which  may  be  of  any  form  as 
  spherical,  cylindrical,  curved,  etc  --Tomlinson. 
 
  From  WordNet  r  1.6  [wn]: 
 
  bulb 
  n  1:  a  modified  bud  consisting  of  a  thickened  globular 
  underground  stem  serving  as  a  reproductive  structure 
  2:  a  glass  bulb  containing  a  wire  filament  (usually  tungsten) 
  that  emits  light  when  heated  [syn:  {light  bulb},  {lightbulb}, 
  {incandescent  lamp},  {electric  light},  {electric-light 
  bulb}] 
  3:  a  rounded  part  of  a  cylindrical  instrument  (usually  at  one 
  end);  "the  bulb  of  a  syringe" 
  4:  lower  or  hindmost  part  of  the  brain;  continuous  with  spinal 
  cord;  (`bulb'  is  an  old  term  for  medulla  oblongata);  "the 
  medulla  oblongata  is  the  most  vital  part  of  the  brain 
  because  it  contains  centers  controlling  breathing  and 
  heart  funtioning"  [syn:  {medulla  oblongata},  {medulla}] 
  5:  a  rounded  dilation  or  expansion  in  a  canal  or  vessel  or 
  organ 




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