In old texts this character is a small dish, an early relative of 碟.
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楪 is not used in modern Chinese; it is a classical word for a small (wooden) dish, and by extension a window-leaf. It is the wood radical 木 plus the phonetic 枼 (a thin flat board), the same phonetic that gives the modern 碟 (plate) and 蝶 (butterfly).
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Classical only; modern Chinese uses 碟子 for a small dish.
枼 pictures a thin flat slip and gives the sound (yè drifted to dié) plus a hint of flatness, fitting a shallow dish. It is the phonetic in 碟, 蝶, and 牒.
No stroke data for 楪; the glyph shown is your device font, so component strokes can't be highlighted.
