• (n.) That portion of the axis which bears the nectocalyces in the Siphonophora. • (n.) That portion of the axis which bears the nectocalyces in the Siphonophora. Found on http://thinkexist.com/dictionary/meaning/nectostem/
Nec'to·stem noun [ Greek ... swimming + English stem .] (Zoology) That portion of the axis which bears the nectocalyces in the Siphonophora. Found on http://www.encyclo.co.uk/webster/N/10