Definition of diadelphous in English:
 diadelphous
adjective ˌdʌɪəˈdɛlfəsˌdaɪəˈdɛlfəs
Botany (of stamens) united by their filaments so as to form two groups.
 Example sentencesExamples
-  The androecium consists of 10 diadelphous stamens.
 -  These consist of 10 diadelphous stamens and a bent, bearded, and beaked style.
 -  The stamens are 6 in number and diadelphous or frequently distinct and numerous.
 -  The ten stamens are arranged in diadelphous fashion, with the staminal column (nine basally fused) surrounding the pistil.
 -  In some species the ten stamens are all united by their filaments or one stamen is free and the other nine are united (diadelphous).
 
Origin
  
Early 19th century: from di-1 'two' + Greek adelphos 'brother' + -ous.
   Definition of diadelphous in US English:
 diadelphous
adjectiveˌdīəˈdelfəsˌdaɪəˈdɛlfəs
Botany (of stamens) united by their filaments so as to form two groups.
 Example sentencesExamples
-  The androecium consists of 10 diadelphous stamens.
 -  In some species the ten stamens are all united by their filaments or one stamen is free and the other nine are united (diadelphous).
 -  The stamens are 6 in number and diadelphous or frequently distinct and numerous.
 -  These consist of 10 diadelphous stamens and a bent, bearded, and beaked style.
 -  The ten stamens are arranged in diadelphous fashion, with the staminal column (nine basally fused) surrounding the pistil.
 
Origin
  
Early 19th century: from di- ‘two’ + Greek adelphos ‘brother’ + -ous.