acervate (v.)

"to heap up," 1610s, from Latin acervatus, past participle of acervare "to heap up," from acervus "heap," which is akin to acer "sharp," from PIE root *ak- "be sharp, rise (out) to a point, pierce." Related: Acervated; acervating; acerval; acervative; acervuline "occurring in clusters; clustered" (by 1859).

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Definitions of acervate from WordNet

acervate (adj.)
pertaining to a growth of fungi that forms a heaped-up mass;
acervate fungous sporophores