ECTOBRONCHIUM
Ec`to*bron"chi*um, n.; pl. Ectobronchia. Etym: [NL. See Ecto-, and
Bronchia.] (Anat.)

Defn: One of the dorsal branches of the main bronchi in the lungs of birds.

ECTOCUNERIFORM; ECTOCUNIFORM Ec`to*cu*ne"ri*form, Ec`to*cu"ni*form, n. Etym: [Ecto- + cuneiform, cuniform.] (Anat.)

Defn: One of the bones of the tarsus. See Cuneiform.

ECTOCYST
Ec"to*cyst, n. Etym: [Ecto- + Gr. (Zoöl.)

Defn: The outside covering of the Bryozoa.

ECTODERM Ec"to*derm, n. Etym: [Ecto- + -derm.] (Biol.) (a) The outer layer of the blastoderm; epiblast. (b) The external skin or outer layer of an animal or plant, this being formed in an animal from the epiblast. See Illust. of Blastoderm.

ECTODERMAL; ECTODERMIC
Ec`to*der"mal, Ec`to*der"mic, a. (Biol.)

Defn: Of or relating to the ectoderm.

ECTOLECITHAL
Ec`to*lec"i*thal, a. Etym: [Ecto- + Gr. (Biol.)