pearl hardening
noun
A preparation of gypsum used to improve the quality of paper.
Origin
Late 19th century.
- palaeolatitudinal
- palaeoliberal
- palaeolimnological
- palaeolimnologist
- palaeolimnology
- palaeolith
- Palaeolithic
- palaeolithical
- palaeolithologic
- Palaeologan
- Palaeologian
- palaeologic
- palaeological
- palaeologist
- palaeology
- palaeolongitude
- palaeomagnetic
- palaeomagnetism
- palaeomagnetist
- palaeomeridian
- palaeometallic
- palaeometeorological
- palaeometeorologist
- palaeometeorology
- palaeomorphic