Webster's English Dictionary

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formula

for.mu.la \'fo.r-my*-l*\ \-.le-, -.li-\ \.fo.r-my*-'la--ik\ 
   \-'la--*-k(*-)le-\ n or formulas also for.mu.lae [L, dim. of forma form] pl 
    1a: a set form of words for use in a ceremony or ritual  1b: a 
   conventionalized statement intended to express some fundamental truth  or 
   principle 2a: RECIPE, PRESCRIPTION  2b: a milk mixture or substitute for 
   feeding an infant  3a: a general fact, rule, or principle expressed in 
   symbols  3b: a symbolic expression of the composition or constitution of a 
   substance  3c: a group of numerical symbols associated to express briefly a 
   single con cept 3d: a combination of signs in a logical calculus  4: a 
   prescribed or set form or method  - for.mu.la.ic aj