B
bar
barotrauma
BC
bends, the
bottom time
bottom timer
bourdon tube
Boyle's Law
buoyancy
buoyancy compensator
burst disk

C
c-card
Celcius
Charles' Law
closed-circuit

D
Dalton's Law
DCS
decompression
decompression sickness
Deutsches Institut fuer Normung (DIN)
DIN
Diver Propulsion Vehicle (DPV)
Doppler ultrasound bubble detector
drysuit

E
exposure suit

F
fill station
first stage
free diving

G
Global Positioning System
GPS

H
Half-Time
hydrostatic pressure
hypercapnia
hypocapnia
hypothermia
hypoxia

K
Kelvin

L
lift bag
log book

M
mixed gas

N
nitrogen
nitrogen narcosis
nitrox
no-decompression limit
NOAA

O
o-ring
open water
oxygen
oxygen toxicity

P
partial pressure
pony bottle
psi
psia

R
rapture of the deep
RBT
recompression
regulator
residual nitrogen time (RNT)
RNT

S
safety stop
salinity
scooter
second stage
SPG
stage bottles
strobe
submersible pressure gauge

T
TBT
thermocline
total bottom time (TBT)
TTL

V
visibility
visual reversal

W
weight belt
wetsuit