(in certain cephalopods) a small tube that connects shell-chambers
2.
(of aphids) a small siphon on the abdomen by which an aphid emits sticky liquid that acts as an alarm pheromone
Examples of 'siphuncle' in a sentence
siphuncle
The siphuncle and conch form of these cephalopods indicate a dominant lifestyle as pelagic, vertical migrants.
Björn Kröger, Thomas Servais, Yunbai Zhang 2009, 'The origin and initial rise of pelagic cephalopods in the Ordovician.', PLoS ONEhttp://europepmc.org/articles/PMC2749442?pdf=render. Retrieved from PLOS CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)