tumulosity

tu·mu·lose

 (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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.