- In <em>botany</em>, a plant in which the growth of the stem is in successive concentric layers.
- A plant belonging to one of the greater part of the vegetable kingdom, and which the plants are characterized by having c wood bark, and pith, the wood forming a layer between the other two, and increasing, if at all, by the animal addition of a new layer to the outside next to the bark. The leaves are commonly netted-veined, and the number of cotyledons is two, or, very rarely, several in a whorl. Cf. <xref urlencoded="endogen">endogen</xref>.
- A <xref>plant</xref> characterized by <xref>wood</xref>, <xref>bark</xref> and <xref>pith</xref>, the wood forming a layer between the other two, and <xref>growth</xref> only occurring on the outside.
- flowering plant with two cotyledons; the stem grows by deposit on its outside