ostracum

甲, 介壳

词形变化

ostraca 复数

释义与例句

n.
  1. 1.

    A fragment of pottery.

  2. 2.

    The middle layer of a molluscan shell.

    生物

词源

From New Latin ostracum, from Ancient Greek ὄστρακον (óstrakon, “pottery fragment; shell”).

来源：wiktionary