siphuncle
noun
si·phun·cle
| \ ˈsīˌfəŋkel\
plural -s
Definition of siphuncle
1a
: a membranous tubular extension of the mantle which runs through the partitions of the chambers to the apex of a shelled cephalopod : siphon
b
: the shelly structures that are usually funnel-shaped or tubular processes of the septa and that ensheathe and support the cephalopod siphuncle
2
: a cornicle of an aphid
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