This is the 10276th most frequent Polish word.
ceramicznych
"Ceramicznych" means "ceramic" or "of ceramics" (relating to ceramic materials).
The word 'ceramicznych' is used as an adjective in the genitive plural form, describing 'materiałów' (materials).
Wszystkie filiżanki są wykonane z materiałów ceramicznych.
All the cups are made of ceramic materials.
Here 'ceramicznych' appears in its corresponding genitive plural form, associated with 'płytek' (tiles).
Kupiliśmy piękne płytki ceramiczne na ścianę do kuchni.
We bought beautiful ceramic tiles for the kitchen wall.
In this sentence, 'ceramicznych' is an adjective in the genitive plural form that modifies the noun 'naczyń' (vessels).