| ectoental | <biology> Relating to, or connected with, the two primitive germ layers, the ectoderm and ectoderm; as, the "ectental line" or line of juncture of the two layers in the segmentation of the ovum. Origin: Gr. Outside + inside. Source: Websters Dictionary (01 Mar 1998) |
|---|---|
| ectoenzyme | <enzyme> An enzyme that is secreted to the outside of the cell and acts extracellularly (between cells, outside of all cells). Compare: endoenzyme. (09 Oct 1997) |
| ectoethmoid | A mass of air cells with thin bony walls forming part of the lateral wall of the nasal cavity; the cells are arranged in three groups, anterior, middle, and posterior, and are closed laterally by the orbital plate which forms part of the wall of the orbit. Synonym: labyrinthus ethmoidalis, ectethmoid, ectoethmoid, lateral mass of ethmoid bone. (05 Mar 2000) |
| ectogenesis | Developing an embryo or embryonic tissue in vitro, or within an artificial environment. (09 Oct 1997) |
| ectogenic teratosis | A teratosis in which there is a deficiency of parts. (05 Mar 2000) |
| ectogenous | Originating from or due to influences from outside of the organism or cell. (09 Oct 1997) |
| ectoglobular | Not within a globular body; specifically not within a red blood cell. (05 Mar 2000) |
| ectohormone | A parahormonal chemical mediator of ecological significance which is secreted, largely by an organism (usually an invertebrate) into its immediate environment (air or water); it can alter the behaviour or functional activity of a second organism, often of the same species as that secreting the ectohormone. See: ecological ectocrine. (05 Mar 2000) |
| ectoine synthase | <enzyme> Catalyses cyclic condensation of n(gamma)-l-2,4-diaminobutyric acid to yield l-ectoine Registry number: EC 4.2.1.- Synonym: ectc gene product (26 Jun 1999) |
| ectolecithal | <biology> 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. Origin: Ecto- + Gr. The yolk of an egg. Source: Websters Dictionary (01 Mar 1998) |
| ectomere | A blastomere (one of the cells formed during the first few divisions of the zygote) which takes part in forming the ectoderm (the outermost tissue layer of an embryo). (09 Oct 1997) |
| ectomerogony | The production of merozoites in the asexual reproduction of sporozoan parasites at the surface of schizonts and of blastophores, or by infolding into the schizont, as contrasted with endomerogony; ectomerogony has been observed in various species of Eimeria. Origin: ecto-+ G. Meros, part, + gone, generation (05 Mar 2000) |
| ectomesenchyme | Synonym: mesectoderm. Origin: ecto-+ G. Mesos, middle, + enkyma, infusion (05 Mar 2000) |
| ectomorph | A constitutional body type or build (biotype or somatotype) in which tissues originating from the ectoderm predominate; from a morphological standpoint, the limbs predominate over the trunk. Synonym: longitype. Origin: ecto-+ G. Morphe, form (05 Mar 2000) |
| ectomorphic | Relating to, or having the characteristics of, an ectomorph. (05 Mar 2000) |