Word of the Day: fissiparous

What's the word I'm thinking of? Today, it's...

fissiparous [fih-SIP-er-us] (adjective) [TWITO, page 54]

Tending to break apart

"This endless multiplication of somatic cells has been going on under the eyes of numerous observers for forty years. What observer has watched for forty years to see whether the fissiparous multiplication of Protozoa does not cease? What observer has watched for one year, or one month or one week?"
--Herbert Spencer, "Professor Weismann's Theories", in Popular Science (1893)

Cactus wound (fissiparous):

(photo by me)