pericyclePronunciation: /ˈpɛrɪsʌɪk(ə)l/Definition of pericycle noun Botany a thin layer of plant tissue between the endodermis and the phloem. Origin: late 19th century: from Greek perikuklos 'spherical', from perikukloun 'encircle'pericycle in other Oxford dictionaries Definition of pericycle in the US English dictionary