
In biological nomenclature, a syntype is any one of two or more biological types that is listed in a description of a taxon where no holotype was designated. Precise definitions of this and related terms for types have been established as part of the International Code of Zoological Nomenclature and the International Code of Nomenclature for algae...
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http://en.wikipedia.org/wiki/Syntype

Each specimen of a type series from which neither a holotype nor a lectotype has been designated. The syntypes collectively constitute the name-bearing type
Found on
http://entomology.ifas.ufl.edu/choate/insectclass/glossary_terms.htm

One of a number of specimens of equal nomenclatural rank that formed all or part of the material the original author had in cases in which the author did not designate or indicate a holotype.
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http://ppathw3.cals.cornell.edu/glossary/Defs_S.htm

<zoology> One of two or more specimens cited by the author at the time of publication of a name for which no holotype was designated. ... (09 Jan 1998) ...
Found on
http://www.encyclo.co.uk/local/20973

Anyone of a series of skins collected in a locality from which the Type is collected.
Found on
https://www.encyclo.co.uk/local/22222

any of two or more specimens listed in a species description where a holotype was not designated
Found on
https://www.encyclo.co.uk/local/22346

A syntype is any of two or more specimens listed in a species description where a holotype was not designated – a practice which was common historically. Those syntypes which have not been replaced are still considered name-bearing types.
Found on
https://www.encyclo.co.uk/local/22658

a type specimen other than the holotype used in the description of a species.
Found on
https://www.infoplease.com/dictionary/syntype
No exact match found.