| ecto- | Ect- Outer, on the outside. See: exo-. Origin: G. Ektos, outside (05 Mar 2000) |
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| ectoantigen | Any toxin or other excitor of antibody formation, separate or separable from its source. Synonym: exoantigen. (05 Mar 2000) |
| ectoATPase | <enzyme> Found in human leukocytes; ecto-mg-atpase isolated from chicken Registry number: EC 3.6.1.- Synonym: ecto-adenosine triphosphatase, atpase, ecto, ecto-atpase, ecto-mg-atpase, ecto-nucleotidase (26 Jun 1999) |
| ectoblast | <biology> The outer layer of the blastoderm; the epiblast; the ectoderm. The outer envelope of a cell; the cell wall. Origin: Ecto- + Gr. Bud, germ. Source: Websters Dictionary (01 Mar 1998) |
| ectobronchium | Origin: NL. See Ecto-, and Bronchia. <anatomy, ornithology> One of the dorsal branches of the main bronchi in the lungs of birds. Source: Websters Dictionary (01 Mar 1998) |
| ectocardia | Congenital displacement of the heart. Synonym: exocardia. Origin: ecto-+ G. Kardia, heart (05 Mar 2000) |
| ectocervical | Pertaining to the pars vaginalis of the cervix uteri lined with stratified squamous epithelium. (05 Mar 2000) |
| ectocervical smear | A cytologic smear of material obtained from the ectocervix, usually by scraping; used principally for the diagnosis of late cervical cancers involving the ectocervix. (05 Mar 2000) |
| ectochoroidea | A layer of loose, pigmented connective tissue on the outer surface of the choroid, resembling and attached to the lamina fusca sclerae. Synonym: lamina suprachoroidea, ectochoroidea, suprachoroid layer, suprachoroidea. (05 Mar 2000) |
| ectocommensal organism | An organism that benefits from living on the outer surface of another organism without harming the other organism. A type of commensalism. (09 Oct 1997) |
| ectocornea | The outer layer of the cornea. (05 Mar 2000) |
| ectocrine | 1. Relating to substances, either synthesised or arising by decomposition of organisms, that affect plant life. 2. A compound with ectocrine properties. 3. An ectohormone. Compare: endocrine, exocrine. Origin: ecto-+ G. Krino, to separate (05 Mar 2000) |
| ectocuniform | <anatomy> One of the bones of the tarsus. See Cuneiform. Origin: Ecto- + cuneiform, cuniform. Source: Websters Dictionary (01 Mar 1998) |
| ectocyst | <zoology> The outside covering of the Bryozoa. Origin: Ecto- + Gr. Bladder. Source: Websters Dictionary (01 Mar 1998) |
| ectoderm | The outer of the three germ layers of the embryo (the other two being mesoderm and endoderm). Ectoderm gives rise to epidermis and neural tissue. (18 Nov 1997) |