13-Letter Words Containing: ATO

• attempting to justify or defend in speech or writing

• providing justification

• a motile male gamete of a plant such as an alga or fern or gymnosperm

• equipment that enables a sophisticated separation, e.g. gas chromatographic or liquid chromatographic separation.

• Any plant, typically living in deserts, that obtains its water from long taproots that reach the water table

• the male reproductive cell; the male gamete

• plant that reproduces by means of seeds not spores