substitution class

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Noun1.substitution class - the class of all items that can be substituted into the same position (or slot) in a grammatical sentence (are in paradigmatic relation with one another)
category, class, family - a collection of things sharing a common attribute; "there are two classes of detergents"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
The management has also decided to give SR15 for holding substitution class, while teachers working on Thursdays will be paid SR50 per period.
The serious problems arise when we ask how to determine the substitution class for `p'.
Similarly, models with different numbers of nucleotide substitution classes must be nested within one another in a hierarchical manner.