germ (n.)
- adenovirus
- aerobe
- amoeba
- anaerobe
- animalcule
- bacillus
- bacteria
- bacterium
- base
- basis
- beginning
- blastula
- bud
- bug
- coccus
- diatom
- dyad
- echovirus
- egg
- embryo
- enterovirus
- fetus
- flagellate
- fount
- fungus
- larva
- loins
- microbe
- microorganism
- microspore
- mold
- monad
- nematode
- nucleus
- nymph
- origin
- ovum
- paramecium
- pathogen
- picornavirus
- protozoa
- protozoon
- reovirus
- rhinovirus
- rickettsia
- root
- rudiment
- salmonella
- saprophyte
- seed
- source
- spark
- spermatozoon
- spirillum
- spirochete
- spore
- staphylococcus
- start
- streptococcus
- tetrad
- triad
- vibrio
- virus
- volvox
- zoospore
- zygote
