Plural of crena; multiple small notches, ridges, or tooth-like projections, especially botanical features.
Latin plural of crena (notch). Following Latin grammar rules, crena becomes crenae in the plural, and this term is retained in scientific Latin used across biology and botany.
Scientific Latin plurals like 'crenae' persist in modern biology because they're internationally understood—a botanist in Japan and one in Brazil both instantly understand 'crenae' without translation!
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