foraminifer
Definition
- Noun:
- A marine microorganism having a calcareous shell with openings where pseudopods protrude: A foraminifer is a single-celled organism, or protist, that lives primarily in marine environments. It is characterized by its shell, called a test, which is typically made of calcium carbonate and features numerous small openings (foramina) through which it extends long, thread-like projections called pseudopods for movement and feeding.
Usage Examples
- Noun:
- The ocean sediment sample was rich in fossilized foraminifers, providing clues about ancient climates.
- Under the microscope, the intricate shell of the living foraminifer was clearly visible.
Advanced Usage
- In scientific contexts: The term is used precisely in paleontology, marine biology, and geology. The plural form "foraminifera" is often used to refer to the entire group or order.
- The study of foraminifera, known as foraminiferology, is crucial for biostratigraphy.
Variants and Related Words
- Foraminifera (n, plural): The order or group to which these organisms belong.
- Foraminifera are among the most common marine plankton.
- Foram (n, informal): A common abbreviated form used by scientists.
- The core sample contained various species of forams.
Synonyms
- Foram (informal abbreviation).
- Testate rhizopod (a more general biological term describing shelled protists with pseudopods).
Related Phrases and Terms
- Foraminiferal ooze: A type of deep-sea sediment largely composed of the calcareous shells of foraminifers.
- The seafloor was covered in a layer of foraminiferal ooze.
Noun
-
marine microorganism having a calcareous shell with openings where pseudopods protrude
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