tweening
n.— «When Disney’s artists created dancing mushrooms almost 70 years ago, they did so by drawing still pictures on dozens of celluloid pages, or “cels.” But, Lopez and his fellow students are learning to use a computer program called Adobe Flash that uses “paths” controlled by algebraic equations and a process called “tweening,” to do the same thing—create the illusion of movement on the screen.» —“Computer Animation Offered ; St. Pius Art Class Teaches Students Growing Technique of Creating Movies” by Jack King redOrbit Oct. 7, 2008. (source: Double-Tongued Dictionary)
Further reading
Amid court-ordered busing in the 1970s, a middle-school teacher tried to distract her nervous students on the first day of class with this strange assignment: find a monarch caterpillar. The result? A memorable lesson in the miracle of metamorphosis...
There was a time when William Shakespeare was just another little seven-year-old in school. Classes in his day were demanding — and all in Latin. A new book argues that this rigorous curriculum actually nurtured the creativity that later flourished...
Tweening is not a term that is unique to Adobe Flash. During the days of hand-drawn cel animation, talented but inexperienced artists actually drew the incremental cels between two main cels and those workers were called “tweeners.” Eventually, a lot of that work was exported to Pacific Rim shops where it could be done more cheaply than in the US. Now, even that work is computerized, since the introduction of 100% computerized animation.