monographer

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mon·o·graph

M0394300 (mŏn′ə-grăf′)n. A scholarly piece of writing of essay or book length on a specific, often limited subject.tr.v. mon·o·graphed, mon·o·graph·ing, mon·o·graphs To write a monograph on.
mo·nog′ra·pher (mə-nŏg′rə-fər) n.mon′o·graph′ic adj.mon′o·graph′i·cal·ly adv.