phel·lo·gen \ˈfeləjə̇n, -ˌjen\noun (-s) Etymology: International Scientific Vocabulary phello- + -gen : a secondary meristem that initiates phellem and phelloderm in the periderm — called also cork cambium • phel·lo·gen·et·ic\| ̷ ̷ ̷ ̷jə̇|ned.ik\adjective • phel·lo·gen·ic\| ̷ ̷ ̷ ̷|jenik\adjective