obligatory

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obligatory

/ob·lig·a·to·ry/ (ob-lig´ah-tor″e) obligate.

obligatory

(ə-blĭg′ə-tôr′ē, ŏb′lĭ-gə-)
adj.
Biology Obligate.

o·blig′a·to′ri·ly adv.

obligatory

unavoidable; something that is bound to occur.

obligatory water diuresis
polyuria resulting from a decrease or inactivity of antidiuretic hormone on distal tubules and collecting ducts.