Crassulacean is pronounced kras-yoo-LAY-shun (five syllables, stress on the third).
IPA: /ˌkræs.jʊˈleɪ.ʃən/
The word is most commonly encountered in the phrase Crassulacean Acid Metabolism (CAM), the photosynthetic pathway named after the family Crassulaceae in which it was first characterised.
Part of the Complete Crassula Guide.
Syllable Breakdown
- kras — as in crass.
- yoo — as in you.
- LAY — stressed, as in lay.
- shun — as in shun, the unstressed final syllable.
Written phonetically: kras-yoo-LAY-shun.
Common Mispronunciations
- "krah-SOO-luh-see-un" — a spelling pronunciation treating the word as if the -cean ending were pronounced like ocean with the full "see-un" ending. This is not the standard scientific pronunciation.
- "KRASS-yoo-lay-shun" — stress on the first syllable. Incorrect; the stress falls on the third syllable.
- "krass-YOO-luh-shun" — dropping a syllable. There are five syllables, not four.
Origin
The word derives from Crassula, the plant genus, with the Latin adjectival suffix -acean (from -aceus, meaning "of the nature of"). The same suffix produces rosaceous (of the rose family), liliaceous (of the lily family), and so on. The stress pattern follows the general English rule for -acean adjectives: stress on the syllable before the suffix.
Usage
The adjective crassulacean appears almost exclusively in the biochemical literature, in the phrase Crassulacean Acid Metabolism or its abbreviation CAM. The pathway was first characterised in plants of the family Crassulaceae in the 1940s–1960s, and the family name stuck to the phenomenon even though many non-Crassulaceae plants (cacti, agaves, pineapples, orchids, some bromeliads) also use it.
The related family name Crassulaceae is pronounced differently — see the Crassulaceae pronunciation guide.
See also
- The Complete Crassula Guide — full explanation of CAM and what it means for cultivation.
- Crassulaceae: How to Pronounce — related family name.
- Crassula ovata — the flagship genus member whose family name the CAM term derives from.
Frequently Asked Questions
Where does the stress fall?
The stress falls on the syllable LAY in standard botanical English.
Is another pronunciation acceptable?
Yes. Classical Latin reconstructions are heard in academic settings, but botanical English is clearer for general horticulture.
What does the word refer to?
It refers to the Crassulaceae family or to crassulacean physiology, depending on the term being used.
Why does the pronunciation matter?
It prevents confusion when discussing Crassula, Crassulaceae, and Crassulacean Acid Metabolism.