ADIT - horizontal tunnel driven for access or drainage.

AIR DOOR - door fixed across a level to direct flow of air for ventilation.

ARCHING - roof supports in a level built of stone, wood, concrete or iron.

BACKFILL - waste rock packed into a disused passage or stope.

BARRACKS - building where miners lodged at the mine during the week.

BLOCK - roughly trimmed lump of slate.

BLONDIN - wire rope spanning a quarry on which a traveling pulley could lift and move loads.

BUDDLE - trough or circular pit where ore was separated from waste.

CABAN - recess cut into the rock underground for shelter.

CROSS CUT - access tunnel driven to cut the lode.

CRUSHER - machine with two revolving drums to crush ore.

DEADS - waste rock stacked in the roof or walls.

DRESSING - the process of separating ore from waste material or producing slates.

DRUMHOUSE - structure supporting the drum of a balanced incline.

ENGINE SHAFT - shaft fitted with pumping equipment.

FATHOM - 6ft unit of measurement.

FIRESETTING - method of breaking up rock by heating with fire and then quenching it with water.

FLAT RODS - iron or wooden rods transmitting motion from an engine to pumps.

FLOOR - working level of a slate quarry.

GANGUE - crystalline minerals found in a lode with ore.

GINGING - stone lining to a shaft.

HOPPER - wooden storage bin holding rock thrown down from a stope.

INCLINE - inclined underground level or surface track for access or haulage.

BALANCED INCLINE - two parallel tracks with pulley wheel at top, where weight of full wagon descending pulled up empty wagon.

CHAIN INCLINE - device running on chain or wire rope instead of rails.

MASS BALANCED INCLINE - single track with iron weight running between the rails to balance weight of down-going load.

POWERED INCLINE - device where engine was used to haul loads upwards.

TABLE INCLINE - where wagons were carried on a moving table rather than on the rails themselves.

JUMPER - long iron rod, pointed at each end, which was used to drill shot holes by repeatedly hitting it against the rock face.

KIBBLE - iron or wooden bucket for raising ore.

LAUNDER - wooden trough for conveying water.

LEAT - surface channel for conveying water.

LEVEL - see ADIT.

LODE - fissure containing a deposit of ore.

MILL - surface building where slate or ore was processed.

MOCHYN - the iron weighted balancing trolley of a mass balanced incline.

OLD MAN - the old miners or their workings.

ORE - material from which metal could be extracted by smelting.

PACK WALL - waste rock stacked as a wall along side of level.

PELTON WHEEL - small waterwheel with cups into which a jet of water was directed.

PILLAR - area of rock left undisturbed to support the roof.

POWDER HOUSE - explosive store.

QUARRY - place where stone or slate was excavated, either on surface or underground

RISE - underground shaft driven upwards.

SETT - area of a mining lease.

SHAFT - vertical or slightly inclined entrance for access, haulage or pumping.

SHEAVE - grooved pulley wheel.

SHOTHOLE - small diameter hole drilled into rock for inserting gunpowder.

SLAB - piece of finished (or partly finished) slate, thicker and larger than a roofing slate.

SLIDEWAY - un-railed incline.

SPOIL - area of waste rock.

STEMPLE - wooden bar jammed between rock walls for climbing or supporting deads.

STOPE - cavity created by removal or ore.

SUMP - underground shaft driven downwards.

TRUNC -table of a table incline.

TWLL - Open slate pit.

VEIN - see LODE.

WHIM - winding engine powered by horse, steam or water.

WINCH - portable device for raising loads, either hand, steam or air powered.

WINZE - see SUMP.