| siphuncle | <zoology> The tube which runs through the partitions of chambered cephalopod shells. Origin: L. Siphunculus, sipunculus, dim. Of sipho. See Siphon. Source: Websters Dictionary (01 Mar 1998) |
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| siphuncled | <zoology> Having a siphuncle; siphunculated. Source: Websters Dictionary (01 Mar 1998) |