[ad. L. acervāt-us, pa. pple. of acervā-re to heap.] Heaped, growing in heaps, or in closely compacted clusters.
1848. Dana, Zoophytes, 293. The spines, in adult specimens, often acervate.
1867. J. Hogg, Microsc., II. ii. 400. Bundles of acervate spiculæ of the flesh.