Word: mainstem
Part of speech: Noun
Syllables: main
stem
Definition: The principal watercourse of a river that has multiple streams
Morphemes:
Affix: main
Language: en
PoS: Noun
Meaning: That which is chief or principal; the chief or main portion; the bulk, the greater part, gross.
Affix: stem
Language: en
PoS: Noun
Meaning: The above-ground stalk (technically axis) of a vascular plant, and certain anatomically similar, below-ground organs such as rhizomes, bulbs, tubers, and corms.