agglomeration
noun [ C ] formal uk/əˌɡlɒm.əˈreɪ.ʃən/ us/əˌɡlɑː.məˈreɪ.ʃən/ (also agglomerate, uk/əˈɡlɒm.ər.ət/ us/-ˈɡlɑː.mɚ-/)
（不同事物的）聚集;堆积
a large group of many different things collected or brought together
an agglomeration of various ethnic and religious groupings 不同种族和宗教的人们的集会