Quote Originally Posted by Marcus View Post
Does [ultramicroscopically] really exist. Сельскохозяйственный, достопримечательность are common words.
The adverb microscopically and the adjective ultramicroscopic are both "real" words, but to combine them into a single adverb ultramicroscopically would be very unusual. So it's more of a "nonce" term that's completely understandable but rarely or never heard, and not found in dictionaries.

On the other hand, ultramicroscopically doesn't sound "ridiculously unreal" like deultramicroscopicalization -- a word that one would probably only hear in the context of a parody of science-fiction -- but not in "straight" (i.e., serious) science-fiction, because the word just sounds rather stupid and semi-literate.

P.S. By the way, the corresponding adjective for microscopically is microscopic -- there's no such word as microscopical (unless it were used in a humorous poem or song to create a rhyme for the real adjectives topical and tropical -- but the effect would be funny).