Ecto-parasite: one that is attached to the external surface of the host.
Ento-parasite: one that feeds within the body of the host.
Embioptera: an ordinal term proposed for the Neuropterous family Embidae.
Hamabiosis: see symbiosis.
Heliophobic: loving darkness: applied to species that shun the light, like, e.g. Termites.
Heliotactic: light loving: applied to species that live in the open and in daylight.
Lestobiosis: see symbiosis.
Meron: in Neuroptera, a sclerite posterior to the coxa and below the epimeron: corresponds to the trochantine in Lepidoptera.
Metasternal wing: in some aquatic Coleoptera a leaf-like expansion above the coxal plates.
Myrmecophily: is the relation existing between ants and those guests that seek their company primarily for their own individual advantage.