tumulosity

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tu·mu·lose

T0409500 (to͞o′myə-lōs′, tyo͞o′-) also tu·mu·lous (-ləs)adj. Having many mounds or small hills.
[Latin tumulōsus, from tumulus, mound; see tumulus.]
tu′mu·los′i·ty (-lŏs′ĭ-tē) n.