4  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Sub-  \Sub-\  [L.  sub  under  below;  akin  to  Gr  ?,  Skr.  upa  to 
  on  under  over  Cf  {Hypo-},  {Super-}.] 
  1.  A  prefix  signifying  under  below,  beneath,  and  hence 
  often  in  an  inferior  position  or  degree,  in  an  imperfect 
  or  partial  state,  as  in  subscribe,  substruct,  subserve, 
  subject,  subordinate,  subacid,  subastringent,  subgranular, 
  suborn.  Sub-  in  Latin  compounds  often  becomes  sum-  before 
  m,  sur  before  r,  and  regularly  becomes  suc-,  suf-,  sug-, 
  and  sup-  before  c,  f,  g,  and  p  respectively.  Before  c,  p, 
  and  t  it  sometimes  takes  form  sus-  (by  the  dropping  of  b 
  from  a  collateral  form  subs-). 
 
  2.  (Chem.)  A  prefix  denoting  that  the  ingredient  (of  a 
  compound)  signified  by  the  term  to  which  it  is  prefixed,is 
  present  in  only  a  small  proportion,  or  less  than  the 
  normal  amount;  as  subsulphide,  suboxide,  etc  Prefixed  to 
  the  name  of  a  salt  it  is  equivalent  to  basic;  as 
  subacetate  or  basic  acetate.  [Obsoles.] 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Sub  \Sub\,  n. 
  A  subordinate;  a  subaltern.  [Colloq.] 
 
  From  WordNet  r  1.6  [wn]: 
 
  sub 
  n  1:  a  large  sandwich  made  of  a  long  crusty  roll  split  lengthwise 
  and  filled  with  meats  and  cheese  (and  tomato  and  onion 
  and  lettuce  and  condiments);  different  names  are  used  in 
  different  sections  of  the  United  States  [syn:  {bomber}, 
  {grinder},  {hero},  {hero  sandwich},  {hoagie},  {hoagy},  {Cuban 
  sandwich},  {Italian  sandwich},  {poor  boy},  {submarine}, 
  {submarine  sandwich},  {torpedo},  {wedge},  {zep}] 
  2:  a  submersible  warship  usually  armed  with  torpedos  [syn:  {submarine}, 
  {pigboat},  {U-boat}] 
  v  :  be  a  substitute  [syn:  {substitute},  {stand  in},  {fill  in}] 
 
  From  The  Free  On-line  Dictionary  of  Computing  (13  Mar  01)  [foldoc]: 
 
  SUB 
 
  {Substitute} 
 
 

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