Defn: Having the food yolk, at the commencement of segmentation, in a peripheral position, and the cleavage process confined to the center of the egg; as, ectolecithal ova.
ECTOMERE
Ec"to*mere, n. Etym: [Ecto- + -mere.] (Biol.)
Defn: The more transparent cells, which finally become external, in many segmenting ova, as those of mammals.
ECTOPARASITE
Ec`to*par"a*site, n. (Zoöl.)
Defn: Any parasite which lives on the exterior of animals; — opposed
to endoparasite.
— Ec`to*par`a*sit"ic, a.
ECTOPIA
Ec*to"pi*a, n. Etym: [NL., fr. Gr. (Med.)
Defn: A morbid displacement of parts, especially such as is congenial; as, ectopia of the heart, or of the bladder.
ECTOPIC
Ec*top"ic, a. (Med.)
Defn: Out of place; congenitally displaced; as, an ectopic organ.
ECTOPLASM Ec"to*plasm, n. Etym: [Ecto- + Gr. (Biol.) (a) The outer transparent layer of protoplasm in a developing ovum. (b) The outer hyaline layer of protoplasm in a vegetable cell. (c) The ectosarc of protozoan.