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tetradynamous

American  
[te-truh-dahy-nuh-muhs] / ˌtɛ trəˈdaɪ nə məs /

adjective

Botany.
  1. having four long and two short stamens, as a cruciferous flower.


tetradynamous British  
/ -ˈdɪn-, ˌtɛtrəˈdaɪnəməs /

adjective

  1. (of plants) having six stamens, two of which are shorter than the others

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of tetradynamous

1820–30; tetra- + Greek -dynamos -powered ( dýnam ( is ) power + -os adj. suffix; -ous )