Sentence:  In this test , 130 gallons of a suspension , having a count of * * f organisms per ml , or a total of approximately * * f <WSD>spores</WSD> , was aerosolized . 
Meaning of the word marked with <WSD> tags:  a small usually single-celled asexual reproductive body produced by many nonflowering plants and fungi and some bacteria and protozoans and that are capable of developing into a new individual without sexual fusion