hornstone
noun
horn·stone ˈhȯrn-ˌstōn 
: a mineral that is a variety of quartz much like flint but more brittle
Word History
First Known Use
1728, in the meaning defined above
- pseudoneuroma
- pseudoneuropter
- Pseudoneuroptera
- pseudoneuropteran
- pseudoneuropterous
- pseudonitrole
- pseudonitrosite
- pseudonucleolus
- pseudonychia
- pseudonychium
- pseudonym
- pseudonymities
- pseudonymity
- pseudonymous
- pseudonymously
- pseudonymousness
- pseudonymousnesses
- pseudonyms
- pseudoparenchyma
- pseudoparenchymas
- pseudoparenchymata
- pseudoparenchymatous
- pseudopelletierine
- pseudopercular
- pseudoperculate