Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of subsesqui- is as below...

Subsextuple :: Subsesqui- () A prefix (also used adjectively) denoting the combination of constituents (especially electro-negative and electro-positive bodies) in the proportion of two to three; as, a subsesqui acetate, i. e., a salt having two equivalents of acetic acid to three of the base..

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