noun
key frame
In animation and video compression, a frame that defines the starting or ending point of a smooth transition; intermediate frames are interpolated.
アニメーションでは、キーフレームを設定してから間のフレームを自動生成する。
In animation, you set key frames and then automatically generate the in-between frames.
Variant with interpunct; less common but seen in some technical contexts.
Borrowed from English 'key frame'.