trabeculation

Etymology tree
Proto-Indo-European *treb-der.
Proto-Italic *trabs
Latin trabs
Proto-Indo-European *-lós
Proto-Indo-European *-elós
Proto-Italic *-elos
Proto-Italic *-kelos
Latin -cula
Latin trabēculalbor.
English trabecula
Proto-Indo-European *-tis
Proto-Indo-European *-Hō
Proto-Indo-European *-tiHō
Proto-Italic *-tiō
Latin -tiō
Latin -ātiōlbor.
Old French -ationbor.
Middle English -acioun
English -ation
English trabeculation
From trabecula + -ation.