- foraminifer
[foraminifer 词源字典]
- "A single-celled planktonic animal with a perforated chalky shell through which slender protrusions of protoplasm extend. Most kinds are marine, and when they die thick ocean-floor sediments are formed from their shells", Mid 19th century: from Latin foramen, foramin- (see foramen) + -fer 'bearing' (from ferre 'to bear').[foraminifer etymology, foraminifer origin, 英语词源]