ynols

https://doi.org/10.1351/goldbook.Y06730
Alk-1-yn-1-ols, $\ce{RC≡COH}$; tautomeric with ketenes $\ce{RCH=C=O}$.
Source:
PAC, 1995, 67, 1307. (Glossary of class names of organic compounds and reactivity intermediates based on structure (IUPAC Recommendations 1995)) on page 1375 [Terms] [Paper]