E-chi´no-derms [Vid. Echinodermata.]
Ech-i-noi´de-a [Gr. echinos, hedgehog; eidos, form.] Echinoderms including sea urchins.
Ec´to-derm [Gr. ektos, outside; derma, skin.]
Ec´to-plasm [Gr. ektos, outside; plasso, form.]
E-den-ta´ta [Lat. e, out of; dens, tooth.] An order of placentals with a small, one-lobed cerebrum; without median, cutting teeth: including armadillos, ant-eaters, and sloths.
El-as-mo-bran´chi-i [Gr. elasmos, metal plate; branchia, gills.] Fish-like vertebrates which have no membrane bones in the skull or the shoulder-girdle; five pairs of strap-like gills attached by their distal ends; claspers to the ventral fins of males; complicated brain with optic nerves forming a decussation.
Em´bry-o [Gr. en, in; bruein, swell.] The term applied to an animal in the earlier stages of development.
Em-bry-ol´o-gy [Gr. embryon, embryo; logos, < lego, speak.] The study of embryos.
En´do-derm [Gr. endon, within; derma, skin.]
En´do-plasm [Gr. endon, within; plasso, form.]