phy·to·mer \ˈfīd.əmə(r)\noun (pluralphytomers \-mə(r)z\ ; alsophy·tom·era \fīˈtämərə\) Etymology: New Latin phytomeron, from phyt- + -meron (from Greek meros part) — more at merit : one of the individual structural units that in serial arrangement make up the body of a plant < a bud-bearing node is a typical phytomer >