Definition of "ununennium"

Element 119: Ununennium (Uue) This has yet to be reported. From its position in the periodic table, in group 1 below francium, this element should have the physical properties of an alkali metal and, were it long-lived enough, the element should display the singly-charged ion M+ as its most favoured chemical state.

2001, John Emsley, “The Elements (A–Z)”, in Nature’s Building Blocks: An A–Z Guide to the Elements, Oxford: Oxford University Press, published 2002 printing, page 468

"[…] Clemson had element 119 and somehow it attached itself to the oxygen atoms on Earth. The commission wants this element 119 to be called Ununennium based on the element number, one, one, and nine." / Sandi speaks into the telephone, "That is ridiculous! Can't you change the name of the element to the person that found the gas cloud back at SETI, Rich Tolt?" / "I can make a recommendation to the rest of the commission, but rarely do they change names. The names for the next ten elements have been chosen based on the element number and the Latin names of that number to make it easier for the world."

2007, Steven Comas, chapter 10, in The Trojan Horse Cloud, Bloomington, Ind.: AuthorHouse, page 77

Our question at the beginning of this essay was "are there more elements to be discovered?" The next elements would be ununennium (atomic number 119) and unbinilium (atomic number 120). The problems in trying to produce these elements by accelerating an ion beam into a target are the short half-lives of possible target elements and the extended times required for a successful observation of a new element. So far, elements 119 and 120 have eluded discovery. But you can expect that scientists will continue to search for new elements.

2017, Darrell D. Ebbing, Steven D. Gammon, “Atoms, Molecules, and Ions”, in General Chemistry, 11th edition, Boston, Mass.: Cengage Learning, page 46