16-letter words containing s, y, a
- yeoman's service — good, useful, or workmanlike service: His trusty sword did him yeoman's service.
- ziegler catalyst — any of a group of catalysts, such as titanium trichloride (TiCl3) and aluminium alkyl (Al(CH3)3), that produce stereospecific polymers
- zygosporangium's — a sporangium that bears a zygospore.