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sirdar
sire
siren
siren call
siren song
siren suit
sirenian
Sirius
sirloin
sirocco
sirrah
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siphonostele
si·phon·o·stele [ sī fónnə stl, sfənə stl ] (plural si·phon·o·steles)


noun 
Definition:
 
part of plant stem: a type of vascular cylinder stele, found in many ferns, in which the water-conducting vessels of the stem are arranged around a central core of pith

si·phon·o·ste·lic [ sī fònnə stlik, sfənə stlik ] adjective
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