The Collaborative International Dictionary of English v.0.48:
Bacteroid \Bac"te*roid\, Bacteroidal \Bac`te*roid"al\, a. [Bacterium + -oid.] (Biol.) Resembling bacteria; as, bacteroid particles. [1913 Webster]WordNet (r) 3.0 (2006):
bacteroidal adj 1: resembling bacteria [syn: bacteroidal, bacteroid, bacterioidal, bacterioid]