| Subject | English | Spanish |
| wood. | boxed pith | médula interior |
| agric., industr., construct. | boxed pith | pieza de corazón |
| commer. | coir pith | médula de bonote |
| forestr. | double pith | doble médula? |
| forestr. | double pith | doble tronco |
| entomol. | large pith borer | jardinero del monte Blastophagus piniperda |
| entomol. | large pith borer | hilesino destructor de los pinos Blastophagus piniperda |
| nat.sc., agric. | larger pith borer | hilesino destructor de los pinos (Blastophagus major, Blastophagus piniperda, Hylesinus piniperda, Myelophilus piniperda, Tomicus piniperda) |
| nat.sc., agric. | larger pith borer | jardinero del monte (Blastophagus major, Blastophagus piniperda, Hylesinus piniperda, Myelophilus piniperda, Tomicus piniperda) |
| el. | pith ball electroscope | electroscopio de médula de saúco |
| industr., construct. | pith content of fibres | contenido de médula vegetal |
| forestr. | pith crack | rotura de médula |
| gen. | pith date | datación de la médula |
| gen. | pith eccentricity | excentricidad de la médula |
| nat.sc., agric. | pith fleck | mancha medular |
| nat.sc., agric. | pith knot | nudo con poco hueco |
| nat.sc., agric. | pith moth | minadora de las yemas (Blastodacna atra, Blastodacna putripennella, Chrysoclista atra, Chrysoclista putripennella) |
| agric. | pith of the sago palm | médula de sagú |
| nat.sc. | pith ray | radio medular |
| nat.sc., agric. | pith ray fleck | mancha medular |
| nat.sc., agric. | pith stock | corazón |
| nat.sc., agric. | pith stock | duramen |
| nat.sc., agric. | pith wander | corazón descentrado |
| nat.sc. | pith wood | madera joven |
| nat.sc., agric. | pith wood | madera joven |