plural of stem
"The researchers used multiple STEm instruments to analyze the nanoscale structures of the sample."
plural of STEM: scanning transmission electron microscopes
In plain English: Stems are the main stalks that hold up plants and carry water to their leaves.
"The red stems connect to the leaves at the top of the plant."
Third-person singular simple present indicative form of stem
"The vine stems grow toward the sunlight every morning."
In plain English: To stem something means to stop it from moving forward or growing any further.
"The problems stem from poor planning at the beginning of the project."
plural of Stem
"The main stems of the corn plants are already about three feet tall."