Search Result for "archaebacterium": 
Wordnet 3.0

NOUN (1)

1. considered ancient life forms that evolved separately from bacteria and blue-green algae;
[syn: archaebacteria, archaebacterium, archaeobacteria, archeobacteria]


WordNet (r) 3.0 (2006):

archaebacterium n 1: considered ancient life forms that evolved separately from bacteria and blue-green algae [syn: archaebacteria, archaebacterium, archaeobacteria, archeobacteria]