noun
- A plant that grows by adding layers of wood to the outside of its stem, such as a dicot or conifer; a plant with external growth rings.
Usage: botany; technical
Examples
- Most trees in temperate forests are exogens that develop visible annual rings.
- The botanist classified the oak as an exogen because of its external growth pattern.
- Exogens differ from endogens in the way they add new tissue to their stems.
- Pine trees are exogens commonly found in northern climates.