Growing inside another organism, e.g. of parasites or cancer tumors, contrasted to exophytic(adjective)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "endophytic" in a sentence
"In the current study, the scientists isolated bacteria normally resident in poplar and willow roots, which are known as endophytic bacteria, and tested selected strains 'abilities to increase poplar growth in a controlled greenhouse environment."
"The Life Box -- you're gonna be getting a DVD of the TED conference -- you add soil, you add water, you have mycorrhizal and endophytic fungi as well as spores, like of the Agaricon mushroom."
"There are also endophytic symbionts (bacteria living inside stems and leaves) and free-living bacterial fixers in soils."