ink-bag
Definition
Noun: - An anatomical structure in certain cephalopods: An "ink-bag" is a sac-like organ found in squid, octopuses, and cuttlefish that contains a dark, inky fluid. This fluid is ejected as a defense mechanism to confuse predators or create a smokescreen in the water.
Usage Examples
- (The organ expelled ink to protect the animal.)
- (The sac containing the defensive ink was examined.)
Advanced Usage
- "to discharge one's ink-bag": In biological contexts, this phrase describes the act of expelling ink.
- The cuttlefish discharged its ink-bag rapidly, creating a dark cloud in the water. (The animal released the ink from its sac.)
Variants and Related Words
Ink (n): the dark fluid itself, not the organ.
- The ink from the bag was used in ancient times as a pigment. (The fluid from the ink-bag.)
Ink sac (n): a synonym for "ink-bag," referring to the same organ.
- The ink sac is located near the animal's digestive tract. (Another term for the ink-bag.)
Synonyms
- Ink sac: the same anatomical structure.
- Cephalopod ink bladder: a more technical term for the organ.
Related Idioms