20. The computer-readable medium of claim 15 , wherein the similarity criterion is a stemming criterion; wherein applying the similarity criterion to the paired candidate abbreviation and constituent term comprises: determining that the constituent term of the pair and the candidate abbreviation share a common prefix, and based on determining that the constituent term of the pair and the candidate abbreviation share a common prefix, determining a comparison value by dividing a number of characters of the common prefix by a length of one of the constituent term of the pair and the candidate abbreviation; and wherein determining that the paired candidate abbreviation and constituent term satisfy the applied similarity criterion comprises determining that the comparison value is greater than or equal to a threshold value.
15. A non-transitory computer-readable medium storing software comprising instructions executable by one or more processing devices which, upon such execution, cause the one or more processing devices to perform operations comprising: receiving a compound term that includes multiple constituent terms, and a candidate abbreviation for the compound term; pairing, with the candidate abbreviation, a constituent term, wherein the paired constituent term is one of the multiple constituent terms that make up a portion of the compound term; applying a similarity criterion to the paired candidate abbreviation and constituent term; determining that the paired candidate abbreviation and constituent term satisfy the applied similarity criterion; and establishing that the candidate abbreviation is not an abbreviation for the compound term, based on determining that the paired candidate abbreviation and constituent term satisfy the applied similarity criterion.