Wiktionary
pluglike
a. Resembling a plug or some aspect of one.
Usage examples of "pluglike".
There were plastic strips that she stuck on and peeled off, grubbing up numerous pluglike impurities from her follicles and pores.
He pushed the three cadets out of the air lock and slammed the pluglike door closed.
Then, after testing their suit intercoms, they closed the inner-portal air lock, reduced the air pressure, and opened the thick pluglike outer portal.