Home › Words › L › leptocylindraceanleptocylindraceanleptocylindracean · noun — any heterokont of the family Leptocylindraceae.Definition from Wiktionary (CC BY-SA 3.0).EtymologyFrom translingual Leptocylindraceae + -an.nounAny heterokont of the family LeptocylindraceaeDefinitions & examples from Wiktionary (CC BY-SA 3.0).