13-letter words containing i, m, u
- with impunity — unpunished
- without demur — If you do something without demur, you do it immediately and without making any protest.
- yttrium metal — any of a subgroup of rare-earth elements, of which the cerium and terbium metals comprise the other two subgroups.
- yttrium oxide — a white, water-insoluble powder, Y 2 O 3 , used chiefly in incandescent gas and acetylene mantles.
- zoosporangium — a sporangium or spore case in which zoospores are produced.