lansiad

== Welsh == === Etymology === From lansio +‎ -ad. === Noun === lansiad m (plural lansiadau, not mutable) launch (act of launching) lansiad tawel ― soft launch === Further reading === R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “lansiad”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies