ˈkras(y)ələ noun
Etymology: New Latin, from Medieval Latin, stonecrop, orpine, from Latin crassus + -ula (diminutive suffix)
1. capitalized : a genus of chiefly So. African succulent herbs (family Crassulaceae) having opposite leaves and flowers with petals separate or connate only at the base
2. plural crassu·lae -ˌlē, -ˌlī also crassulas : a plant of the genus Crassula
3. plural crassulae : a thickening of the middle lamella and primary wall between or around bordered pits or pit fields especially prominent on the radial walls of tracheids in gymnosperm wood — called also bar of Sanio, rim of Sanio, Sanio's beam