'Bacteroid' definitions:

Definition of 'bacteroid'

adjective

Resembling bacteria [syn: bacteroidal, bacteroid, bacterioidal, bacterioid]

noun

A rodlike bacterium (especially any of the rod-shaped or branched bacteria in the root nodules of nitrogen-fixing plants)

From: GCIDE

Bacteroid \Bac"te*roid\, Bacteroidal \Bac`te*roid"al\, a. [Bacterium + -oid.] (Biol.) Resembling bacteria; as, bacteroid particles. [1913 Webster]