What is the etymology of the scientific term "tomont", referring to a life stage of certain parasitic organisms such as Cryptocaryon irritans?
The Oxford English Dictionary has an entry for a combining form "-ont" which is says is
< ancient Greek ὀντ-, ὄν being (see onto- comb. form). Compare German -ont. Combining with first elements of Greek origin. Formations are found from the late 19th cent.
Forming nouns denoting organisms (or cells) of a particular type, esp. protozoa at a particular stage in the life cycle.
This appears to be the source of the end part of tomont. But I can only guess about the first part. The main candidate I have been able to find so far is Greek τόμος (tomos) meaning "slice" or "piece", but I don't know exactly why this would have been used as the base of the scientific term. I'd also like to know whether the etymology is explicitly given in any source. The word seems to have existed since at least the first half of the 20th century.