from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A tubelike structure in the body of a shelled cephalopod, such as a nautilus, extending through each chamber of the shell.
- n. A tubular organ on the abdomen of an aphid, from which a waxy fluid is secreted as a pheromone when the insect is attacked. Also called cornicle.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A strand of tissue passing longitudinally through the shell of a cephalopod mollusk, used primarily in emptying water from new chambers as the shell grows.
from the GNU version of the Collaborative International Dictionary of English
- n. The tube which runs through the partitions of chambered cephalopod shells.
from The Century Dictionary and Cyclopedia
- n. In zoöl:
- n. A siphon; especially, the siphon or funnel of tetrabranchiate cephalopods, between the chambers of the shell which it connects. See cut under Tetrabranchiata.
- n. In entomology, same as nectary, 2. Also called cornicle, honey-tube, siphonet, and siphunculus.
- n. In the cephalopods, the calcareous tubular wail of the siphon.
- n. The protrusible portion of the mouth-parts of a true louse, supposed to be modifications of the epipharynx and hypopharynx.
Latin sīphunculus, diminutive of sīphō, sīphōn-, siphon; see siphon.(American Heritage® Dictionary of the English Language, Fourth Edition)