diarch


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diarch

(ˈdaɪɑːk)
adj
(Botany) botany (of a vascular bundle) having two strands of xylem
[C19: from Greek di-1 + archē beginning, origin]
References in periodicals archive ?
In the case of Romania, as of other Central and Eastern European countries, the most important motivation for this type of constitutional design--the "weak" or "attenuated" semi-presidentialism--was, in my view, the fear of the risk of authoritarian derives and autocratic presidential behaviors and this explains why in almost all post-communist European space the description of the role and function of the President is often evasive and even ambiguous and, also, why in this space of Europe the President plays a symbolic role or a role of representation rather than one of decision-maker or "diarch".
The roots were either diarch with two primary xylem strands or triarch with three primary xylem strands cleaving into two or three wide secondary xylem lobes.