placoid /plakˈoid/

1. (of scales) plate-like
2. (of fish, eg sharks) having placoid scales, irregular plates of hard bone, not imbricated

• son of…
• sonogram
• sonograms
• sonograph
• sonographer
• sonographers
• sonographies
• sonographs
• sonography
• sonoluminescence
• sonorant
• sonorants
• sonorities
• sonority
• sonorous
• saddle-stitching
• saddletree
• saddletrees
• saddle up
• saddling
• saddo
• saddos
• Sadducaean
• Sadducean
• Sadducee