concretion
n. 结石；凝固；凝固物
例句
Objective To analyze the features of infant urinary concretion.
目的：分析婴幼儿泌尿系结石的特点。
Ambergris is the concretion in the intestine of the sperm - whale.
龙涎香是抹香鲸肠内的结石。
Concretion found in New Zeland. Concretion found in the steppe of Kazakhstan.
这种聚集在新西兰被发现，在哈萨克斯坦的大草原上也有发现。
