A vocabulary of landscape — a landscape of words 975 entries

ambergris

AM-ber-grees
A waxy grey solid formed in the gut of a sperm whale, apparently around the indigestible beaks of the squid it eats, then voided and left to cure at sea for years. Fresh, it smells like what it is. Aged in salt water and sun, it turns sweet, marine, and strangely persistent, and became the most valuable fixative in perfumery — the thing that holds a scent on skin. It washes up on beaches, the only reliable way anyone finds it.
Etymology
Old French ambre gris, grey amber, through Medieval Latin from Arabic ʿanbar — and that is the crux of it. ʿAnbar originally meant this and only this, the whale substance, brought west by Arab traders in the Middle Ages. When Europeans needed a name for the fossil tree resin washing up on Baltic beaches, they reached for the same word, because both turned up on the tideline and neither made any sense.
Notes
Samuel Johnson recorded nine competing theories of what ambergris actually was. Charles II is said to have liked it with eggs. In Chinese it is 龙涎香 — dragon’s spittle fragrance. Most of the perfume industry now uses Ambroxide, a synthetic that reproduces the useful part of it.