- pinacodermThe outermost layer of cells (pinacocytes) in the phylum Porifera (sponges), equivalent to the epidermis, and characterized as an epithelial layer of flattened cells.
- pinacolany tetra-substituted derivative of ethylene glycol, of general formula R₂C(OH)-C(OH)R₂, especially the simplest example where R is methyl
- pinaconeSynonym of pinacol.
- pinaculumA chitin plate on the skin of a caterpillar.
- pinaxA tablet or register.