We found 12 dictionaries that define the word alkynes:

General (6 matching dictionaries)

1. alkynes: Merriam-Webster
2. alkynes: Collins English Dictionary
3. alkynes: Wiktionary
4. alkynes: Dictionary.com
5. Alkynes: Wikipedia, the Free Encyclopedia
6. Alkynes: TheFreeDictionary.com

Computing (1 matching dictionary)

7. Alkynes: Encyclopedia

Medicine (3 matching dictionaries)

8. Medical Dictionary (No longer online)
9. online medical dictionary (No longer online)
10. Alkynes: Medical dictionary

Science (1 matching dictionary)

11. Chemistry Dictionary (No longer online)

Tech (1 matching dictionary)

12. Glossary of Meteorology (No longer online)

(Note: See alkyne as well.)

Definitions from Wiktionary (alkyne) ▸ noun:  (organic chemistry) A hydrocarbon containing at least one carbon–carbon triple bond. ▸ Also see alkyne Opposite: alkanes, alkenes, hydrocarbons Types: ethyne, propyne, but-1-yne, but-2-yne, but-3-yne, but-4-yne, more... ▸ Words similar to alkynes ▸ Usage examples for alkynes ▸ Idioms related to alkynes ▸ Wikipedia articles (New!) ▸ Popular adjectives describing alkynes ▸ Words that often appear near alkynes ▸ Rhymes of alkynes ▸ Invented words related to alkynes