trifarious /trī-fāˈri-əs/

1. Arranged in three rows
2. Facing three ways

• thumbier
• thumbiest
• thumbikins
• thumb index
• thumb-index
• thumb-indexed
• thumb indexes
• thumb-indexes
• thumb-indexing
• thumb indices
• thumbing
• thumbkins
• thumb knot
• thumb knots
• thumb latch
• thumb latches
• thumbless
• thumblike
• thumbling
• thumblings
• thumb mark
• thumb-marked
• thumb marks
• thumbnail
• thumbnails