drimi´um (δριμύς, biting, pungent), an alkaline habitat, and the corresponding formation; drimad, a plant of such a formation.
driodi´um (δρίος, thicket), a dry thicket formation; driodad, plant of a dry thicket.
dysgeogenous (δυς-, bad, γῆ, soil), weathering with difficulty to form soil.
ecad (οἶκος, home), a habitat form due to origin by adaptation; ece´sis (οἰκῆσις, act of coming to be at home), the germination and establishment of invaders; ecograph, an instrument for measuring a physical factor of a habitat; ecotone (τόνος, tension), the tension line between two zones, formations, consocies, etc.
ecballi´um, (ἐκβάλλω, cut down forests), a succession due to lumbering.
echard (ἔχω, to withhold), the non-available water of the soil.
edobole (οἶδος, swelling), a plant whose seeds are scattered by propulsion through turgescence.
efficient difference, the amount of a physical factor necessary to produce a change in the response.
enauli´um (ἔναυλος, hollow channel), a sanddraw formation; enaulad, a sanddraw plant.
ende´mic (ἐν, within, δῆμος, district), occurring in a single formation, or natural region; ende´mism, the condition of growing in but one natural area.