noun
: a vascular bundle (as in plants of the family Umbelliferae) situated in the peripheral part of the pith of a stem and sometimes held to be an extension of a leaf trace
noun
: a vascular bundle (as in plants of the family Umbelliferae) situated in the peripheral part of the pith of a stem and sometimes held to be an extension of a leaf trace
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012