Dictionaries and encyclopedias are mighty distracting. While looking up Moho, I found moity and moisty in the OED. At least there is the beer quote from Chaucer to relate one of the words to geologists.
moity: Of wool: containing particles of wood or other foreign substances.
moisty: 2. Of beer: new, fresh; = Obs.
c1390 Chaucer Manciple’s Tale 60 For were it wyn or old or moisty ale That he hath dronke, he speketh in his nose.
Our new map “Tectonic framework of the Alps / Carte tectonique des Alpes” includes an ancillary map titled “Moho depth map = Carte de profondeur du Moho.” We got our moho working…
The OED gives the definition of Moho:
Moho: The discontinuity between the earth’s crust and the mantle which is believed to exist at a depth of about 10–12 km (6–7½ miles) under the ocean beds and 40–50 km (25–30 miles) under the continents. Also called Mohorovičić discontinuity.
1956 Adv. Geophysics 3 118 The boundary..is now called the Mohorovičić discontinuity (vulgarly ‘The Moho’).
The Glossary of Geology defines it as:
Moho (Mo’-ho) Abbreviated form of Mohorovicic discontinuity, suggested by Birch (1952, p.229). Sp: discontinuidad de Mohorovicic.
musings from the Walter Geology Library on geosciences, books, maps, libraries