siphonostele

[sahy-fon-uh-steel, sahy-fuh-nuh-steel]

si·phon·o·stele

[sahy-fon-uh-steel, sahy-fuh-nuh-steel]
noun Botany.
a hollow tube of vascular tissue enclosing a pith and embedded in ground tissue.

Origin:
1905–10; siphono- + stele

si·pho·no·ste·lic [sahy-fuh-nuh-stee-lik] , adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Siphonostele is always a great word to know.
So is alternation of generations. Does it mean:
male reproductive structure which produces gametes in ferns, mosses, fungi and algae
variation in an organism's life cycle of dissimilar reproductive forms
Collins
World English Dictionary
siphonostele (ˈsaɪfənəˌstiːl)
 
n
botany See also stele the cylinder of conducting tissue surrounding a central core of pith in certain stems
 
[C19: from siphon + stele]
 
siphonostelic
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
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