acarpous

effete no longer fertile worn out 
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acarpous

[adj] - producing no fruit
Found on http://www.webdictionary.co.uk/definition.php?query=acarpous

Acarpous

A·car'pous adjective [ Greek ...; 'a priv. + ... fruit.] (Botany) Not producing fruit; unfruitful.
Found on http://www.encyclo.co.uk/webster/A/12

acarpous

adjective producing no fruit
Found on http://wordnetweb.princeton.edu/perl/webwn?s=acarpous

Acarpous

• (a.) Not producing fruit; unfruitful.
Found on http://thinkexist.com/dictionary/meaning/acarpous/

acarpous

acarpous Without fruit, not bearing fruit; sterile.
Found on http://www.wordinfo.info/words/index/info/view_unit/1539/

acarpous

sterile; not bearing fruit
Found on http://phrontistery.info/a.html
No exact match found