Source : Webster's Revised Unabridged Dictionary (1913)

Detrition \De*tri"tion\, n. [LL. detritio. See {Detriment}.]
   A wearing off or away.

         Phonograms which by process long-continued detrition
         have reached a step of extreme simplicity. --I. Taylor
                                                  (The
                                                  Alphabet).

Source : WordNet®

detrition
     n 1: erosion by friction [syn: {abrasion}, {attrition}, {corrasion}]
     2: the wearing down of rock particles by friction due to water
        or wind or ice [syn: {grinding}, {abrasion}, {attrition}]
     3: effort expended in rubbing one object against another [syn:
        {friction}, {rubbing}]