Denshi Jisho — Online Japanese dictionary

結びつく むすびつく to be connected or related; to join together
Common word, Godan verb with ku ending 

You can also

Look up kanji details for 結びつく.

Try a Yahoo Jisho search for 結びつく .
Try a Goo Jisho search for 結びつく .
Try a Google search for 結びつく .