Someone or something that forms bolls, or in agriculture, a plant (especially cotton) that produces bolls.
From 'boll' plus the agent suffix -er, meaning 'one that bolls' or 'one that produces bolls,' following standard English word formation for describing entities that perform an action.
Cotton breeders spend years developing better boller varieties that mature bolls more evenly and reliably, because even distribution of bolls across a plant makes harvesting more efficient and economical.
Complete word intelligence in one call. Free tier — 50 lookups/day.