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Meaning of IF

Pronunciation:  if

 
Webster's 1913 Dictionary
 
 Definition: 
\If\, conj. [OE. if, gif, AS. gif; akin to OFries. ief, gef,
ef, OS. ef, of, D. of, or, whether, if, G. ob whether, if,
OHG. oba, ibu, Icel. ef, Goth. iba, ibai, an interrogative
particle; properly a case form of a noun meaning, doubt (cf.
OHG. iba doubt, condition, Icel. if, ef, ifi, efi), and
therefore orig. meaning, on condition that.]
1. In case that; granting, allowing, or supposing that; --
   introducing a condition or supposition.

         Tisiphone, that oft hast heard my prayer, Assist, if
         [OE]dipus deserve thy care.           --Pope.

         If thou be the Son of God, command that these stones
         be made bread.                        --Matt. iv. 3.

2. Whether; -- in dependent questions.

         Uncertain if by augury or chance.     --Dryden.

         She doubts if two and two make four.  --Prior.

{As if}, {But if}. See under {As}, {But}.

 
Biology Dictionary
 
 Definition: A type of protein which plays an important role in initiating the translation of an mRNA molecule into a polypeptide. Initiation factors help form the complex between the mRNA and a ribosome.
 

 

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