Stem may refer to:

• Plant stem, the above ground axis of a vascular plant.
• STEM fields (Science, Technology, Engineering and Mathematics).
• Stem (linguistics), the base part of a word not including inflectional morphemes.
• Stem (music), a part of a written musical note.
• Stem (skiing) is a technique in skiing.
• A Stem (bike) is the forward extension which connects the fork to the handlebars of a bicycle.
• Stem (ship), the upright member mounted on the forward end of a vessel's keel, to which the strakes are attached.
• Scanning transmission electron microscope.

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