olemus
tühi koht tekstis,
näiteks tühikute või tabeldusega tekitatud

Wiktionary:
1. white area between written characters and graphic regions on a produced page or computer display; blanks and the vertical blank lines in between paragraphs, or other organized rows of text lines (poetry)
2. (computer science) any single character or series of characters that represents horizontal or vertical space in typography

vt ka
- kettatühemik
- tühemeviirus