How does the word sound?
History of this Word
"ecto" is from "ek" (out) spoken by people of Greece starting about 1000 B.C.
Definition
A prefix added to the start of a word. Indicates that "outside" modifies the word. Created to expand meanings. Can be used with many words to form new words.
Examples of how the word is used
| Ectoderm, the most exterior germ layer, forms skin, brain, the nervous system, and other external tissues. |
| Ectomere, the more transparent cells, which finally become external, in many ova, as those of mammals. |