- (grammar) said of a language, characterized by a prevalence of relatively long words containing a large number of morphemes. Typically, the morphemes are bound (i.e., they cannot stand alone as independent words). An example of a polysynthetic language is Ojibwe, where:
- baataanitaaanishinaabemong = "being able to speak Ojibwe."
- ngiinitaaozhibii'amaadimin = "we used to write to each other."
- (mineralogy) Having layers of twin crystals