• (a.) Having a sucker at each extremity, as certain entozoa, by means of which they adhere.
Am·phis'to·mous adjective [ Greek ... + ... mouth.] (Zoology) Having a sucker at each extremity, as certain entozoa, by means of which they adhere. 
amphistomous, amphistomatic Having a sucker at each extremity, as certain entozoa, which are used to adhere to environmental surfaces.