semialdehyde
noun
semialdehyde is a noun meaning “The monoaldehyde of a dicarboxylic acid; those of some amino acids are intermediates in biosynthesis” (English Wiktionary, September 2026). It is spelled S-E-M-I-A-L-D-E-H-Y-D-E, and it appears about once in every 78 million words in written English (wordfreq, 2021 data). The plural of semialdehyde is semialdehydes.
What does semialdehyde mean?
noun
- 1
The monoaldehyde of a dicarboxylic acid; those of some amino acids are intermediates in biosynthesis
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
Forms of semialdehyde
- semialdehydes plural
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).
How common is semialdehyde?
Semialdehyde appears about once in every 78 million words in written English, the 279,513th most frequent word form in the list.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
Where does semialdehyde come from?
From semi- + aldehyde.
Source: English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0), through kaikki.org (Wiktextract).