Spore Posted on November 8, 2022August 1, 2023 by Tex Norwood (1) The reproductive body of a fungus or other lower plant, containing one or more cells. (2) A bacterial cell modified to survive in an adverse environment. (3) The reproductive unit of ferns. Related Articles: Glossary: RustPlumeria RustMicro-organisms in the growing mediumWater types, quality and treatments