eucalyptus gum: reddish-brown dried gummy exudation from any of several trees of the genus Eucalyptus especially Eucalyptus camaldulensis
entity: that which is perceived or known or inferred to have its own distinct existence (living or nonliving)
lily of the valley: low-growing perennial plant having usually two large oblong lanceolate leaves and a raceme of small fragrant nodding bell-shaped flowers followed by scarlet berries