Here are some examples:
* A collection of poems: "Kabi-r sankhalika" (কবি-র সঙ্কলিকা)
* A compilation of essays: "Nibondho sankhalika" (নিবন্ধ সঙ্কলিকা)
* A collection of stories: "Golpo sankhalika" (গল্প সঙ্কলিকা)
It can also be used to refer to a person who compiles things:
* A compiler of books: "Grantha sankhalika" (গ্রন্থ সঙ্কলিকা)
So, the meaning of "sankhalika" depends on the context.