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  1  definition  found 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
  Dog  \Dog\  (d[o^]g),  n.  [AS.  docga  akin  to  D.  dog  mastiff,  Dan. 
  dogge,  Sw  dogg.] 
  1.  (Zo["o]l.)  A  quadruped  of  the  genus  {Canis},  esp.  the 
  domestic  dog  ({C.  familiaris}). 
  Note:  The  dog  is  distinguished  above  all  others  of  the 
  inferior  animals  for  intelligence,  docility,  and 
  attachment  to  man.  There  are  numerous  carefully  bred 
  varieties,  as  the  beagle,  bloodhound,  bulldog, 
  coachdog,  collie,  Danish  dog,  foxhound,  greyhound, 
  mastiff,  pointer,  poodle,  St  Bernard,  setter,  spaniel, 
  spitz  dog,  terrier,  etc  There  are  also  many  mixed 
  breeds,  and  partially  domesticated  varieties,  as  well 
  as  wild  dogs,  like  the  dingo  and  dhole.  (See  these 
  names  in  the  Vocabulary.) 
  2.  A  mean  worthless  fellow;  a  wretch. 
  What  is  thy  servant,  which  is  but  a  dog,  that  he 
  should  do  this  great  thing?  --  2  Kings 
  viii.  13  (Rev. 
  Ver.  ) 
  3.  A  fellow;  --  used  humorously  or  contemptuously;  as  a  sly 
  dog;  a  lazy  dog.  [Colloq.] 
  4.  (Astron.)  One  of  the  two  constellations,  Canis  Major  and 
  Canis  Minor,  or  the  Greater  Dog  and  the  Lesser  Dog.  Canis 
  Major  contains  the  Dog  Star  (Sirius). 
  5.  An  iron  for  holding  wood  in  a  fireplace;  a  firedog;  an 
  6.  (Mech.) 
  a  A  grappling  iron,  with  a  claw  or  claws,  for  fastening 
  into  wood  or  other  heavy  articles,  for  the  purpose  of 
  raising  or  moving  them 
  b  An  iron  with  fangs  fastening  a  log  in  a  saw  pit,  or  on 
  the  carriage  of  a  sawmill. 
  c  A  piece  in  machinery  acting  as  a  catch  or  clutch; 
  especially,  the  carrier  of  a  lathe,  also  an 
  adjustable  stop  to  change  motion,  as  in  a  machine 
  Note:  Dog  is  used  adjectively  or  in  composition,  commonly  in 
  the  sense  of  relating  to  or  characteristic  of  a  dog. 
  It  is  also  used  to  denote  a  male;  as  dog  fox  or  g-fox, 
  a  male  fox;  dog  otter  or  dog-otter,  dog  wolf,  etc.;  -- 
  also  to  denote  a  thing  of  cheap  or  mean  quality;  as 
  dog  Latin. 
  {A  dead  dog},  a  thing  of  no  use  or  value.  --1  Sam.  xxiv.  14. 
  {A  dog  in  the  manger},  an  ugly-natured  person  who  prevents 
  others  from  enjoying  what  would  be  an  advantage  to  them 
  but  is  none  to  him 
  {Dog  ape}  (Zo["o]l.),  a  male  ape. 
  {Dog  cabbage},  or  {Dog's  cabbage}  (Bot.),  a  succulent  herb, 
  native  to  the  Mediterranean  region  ({Thelygonum 
  {Dog  cheap},  very  cheap.  See  under  {Cheap}. 
  {Dog  ear}  (Arch.),  an  acroterium.  [Colloq.] 
  {Dog  flea}  (Zo["o]l.),  a  species  of  flea  ({Pulex  canis}) 
  which  infests  dogs  and  cats,  and  is  often  troublesome  to 
  man.  In  America  it  is  the  common  flea.  See  {Flea},  and 
  {Dog  grass}  (Bot.),  a  grass  ({Triticum  caninum})  of  the  same 
  genus  as  wheat. 
  {Dog  Latin},  barbarous  Latin;  as  the  dog  Latin  of  pharmacy. 
  {Dog  lichen}  (Bot.),  a  kind  of  lichen  ({Peltigera  canina}) 
  growing  on  earth,  rocks,  and  tree  trunks,  --  a  lobed 
  expansion,  dingy  green  above  and  whitish  with  fuscous 
  veins  beneath. 
  {Dog  louse}  (Zo["o]l.),  a  louse  that  infests  the  dog,  esp. 
  {H[ae]matopinus  piliferus};  another  species  is 
  {Trichodectes  latus}. 
  {Dog  power},  a  machine  operated  by  the  weight  of  a  dog 
  traveling  in  a  drum,  or  on  an  endless  track,  as  for 
  {Dog  salmon}  (Zo["o]l.),  a  salmon  of  northwest  America  and 
  northern  Asia;  --  the  {gorbuscha};  --  called  also  {holia}, 
  and  {hone}. 
  {Dog  shark}.  (Zo["o]l.)  See  {Dogfish}. 
  {Dog's  meat},  meat  fit  only  for  dogs;  refuse;  offal. 
  {Dog  Star}.  See  in  the  Vocabulary. 
  {Dog  wheat}  (Bot.),  Dog  grass. 
  {Dog  whelk}  (Zo["o]l.),  any  species  of  univalve  shells  of  the 
  family  {Nassid[ae]},  esp.  the  {Nassa  reticulata}  of 
  {To  give  or  throw},  {to  the  dogs},  to  throw  away  as  useless. 
  ``Throw  physic  to  the  dogs;  I'll  none  of  it.''  --Shak. 
  {To  go  to  the  dogs},  to  go  to  ruin;  to  be  ruined.