| ectopy | <medicine> Same as Ectopia. Source: Websters Dictionary (01 Mar 1998) |
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| ectoretina | The outer layer of the retina, consisting of pigmented epithelium. Synonym: ectoretina, stratum pigmenti bulbi, stratum pigmenti retinae, tapetum nigrum, tapetum oculi. (05 Mar 2000) |
| ectorganism | <biology> An external parasitic organism. Origin: Ect- + organism. Source: Websters Dictionary (01 Mar 1998) |
| ectosarc | <biology> The semisolid external layer of protoplasm in some unicellular organisms, as the amoeba; ectoplasm; exoplasm. Origin: Ecto- + Gr, flesh. Source: Websters Dictionary (01 Mar 1998) |
| ectoscopy | An obsolete method of diagnosis of disease of any of the internal organs by a study of movements of the abdominal wall or thorax caused by phonation. Origin: ecto-+ G. Skopeo, to examine (05 Mar 2000) |
| ectosteal | <physiology> Of or pertaining to ectostosis; as, ectosteal ossification. Source: Websters Dictionary (01 Mar 1998) |
| ectostosis | <physiology> A process of bone formation in which ossification takes place in the perichondrium and either surrounds or gradually replaces the cartilage. Origin: NL. See Ect-, and Ostosis. Source: Websters Dictionary (01 Mar 1998) |
| ectosymbiont | An organism which is participating in ectosymbiosis (a form of symbiosis in which the organisms involved are physically separated). (09 Oct 1997) |
| ectosymbiosis | Symbiosis between two organisms which are physically separated from each other. Compare: endosymbiosis. (09 Oct 1997) |
| ectotherm | An organism that does not generate its own body heat and must use an external source of heat to warm itself. A cold-blooded organism. (09 Oct 1997) |
| ectothermic | Able to maintain a constant body temperature with an external heat source. (09 Oct 1997) |
| ectothrix | A sheath of spores (conidia) on the outside of a hair. Origin: ecto-+ G. Thrix, hair (05 Mar 2000) |
| ectotoxin | <protein> Toxin released from gram-positive and gram-negative bacteria as opposed to endotoxins that form part of the cell wall. Examples are cholera, pertussis and diphtheria toxins. Usually specific and highly toxic. (18 Nov 1997) |
| ectotrophic | Describes an organism that gets its nutrients from the outside surface of its host. (09 Oct 1997) |
| ectotrophoblastic cavity | A developmental cavity appearing between the trophoblast and the embryonic disk ectoderm in some mammals. (05 Mar 2000) |