B2B (Business to Business)

B2C (Business to Consumer)

B/L (Bill of Lading or BOL)

Back Charge

Back-Fire

Back Flow

Back Pressure (or Backpresssure)

Back Titration 

Back to Back

Back to Back Guarantee

Backdrafting

Backfill

Background Level

Background Radiation

Backhauling

Backletter (Back Letter)

Backlog

Backstop

Backup

Backup Energy System

Backward

Backward Pass

Backwash

Bacteria

Bacterial Resistance

Bacterium

Baffle

Baghouse

Bail

Balance

Balance of Plant (BOP)

Balance of System (BOS)

Balanced Equation 

Balancing Agreement

Balancing Area

Bale

Bale Capacity

Baling

Ball Out

Ball Park Estimate

Ball Park Figure

Ball Valve

Ballast

Ballast Factor

Balmer Series

Band

Band Gap Energy (Eg)

Bandwagon Effect

Bank

Bank Deposit

Bank Holiday

Banker's Acceptance (B/A)

Bankruptcy

Bankruptcy Search

Banks

Bar

Bar (bar)

Bar Bending Schedule

Bar Chart

Bar Chart Schedule

Barcode

Barcol Hardness

Barge

Barium (Ba)

Barometer

Barrel

Barrier

Barrier Coating

Barrier to Entry (or Economic Barrier to Entry)

Barriers to Entry

Barrister

Barter

Barter Transactions

Basal Metabolism

Base

Base Anhydride (Basic Anhydride)

Base Flow

Base Gas (or Cushion Gas)

Base Load

Base Load Capacity

Base Load Demand

Base Load Power Plant

Base Metal

Base Proposal

Baseboard Radiator

Baseline

Baseline Centric

Baseline Risk Assessment

Basement

Bases

Basic

Basic Engineering

Basic Event

Basic Price

Basic Process Control System (BPCS)

Basic Research

Basic Solution 

Basin

Basis

Basis of Design

Baskets

BAT (Best Available Techniques)

Batch

Batch Plant

Batch Process

Batch Reactor

Batch Sheet

Batt

Battery

Battery Capacity

Battery Cell

Battery Cycle Life

Battery Energy Storage

Battery Life

Battery Limit

Battery Limit Condition

Battery Rack

Battre Board (Batter Board)

Baud

bbl/d (bbl/day or BPD, Barrels per Day)

Beach Mark

Beach Price

Beacon

Beadwall

Beam Pump

Beam Radiation

Bearing

Becquerel

Bed Moisture

BEDD (Basic Engineering Design Data)

BEDD (Basis of Engineering and Design Data)

BEDQ (Basic Engineering Design Questionnaire)

BEDQ (Basis of Engineering and Design Questionnaire)

Bedrock

Beer Lambert Law (or Beer's Law, or Lambert Beer Law, or Beer Lambert Bouguer Law)

Beer O'clock

Behaviour (or Behavior)

Believe

Below Cost (RBC)

Belt Effect

Benchmark (or Bench Mark)

Benchmark Oil

Benchmarking

Bend

Beneficial

Beneficial Owner

Beneficiary

Benefit

Benefit Transfer

Benefits and Burdens

Benzene (C6H6)

Berkelium (Bk)

Berne Convention

Bernoulli Equation

Bernoulli's Principle

Beryllium (Be)

Bespoke

Best Available Techniques (BAT)

Best Available Technology

Best Practices

Beta Decay

Beta (β) Particle and Radiation

Beta Test Unit

Bevel

Beverage

BFD (Block Flow Diagram)

BHP (Brake Horsepower)

Bias

Bibliography

Bibliometrics

Bid

Bid Bond

Bid Evaluation

Bid Evaluation Criteria

Bid Rigging

Bid/ No-bid (Go/ No-go or Proposal/ No-proposal) Decision

Bid/ No-bid Evaluation Criteria

Bidder

Bidder List

Bidirectional Flame Arrester

Bifunctional Catalyst

Big Data

Big Tech

Bilateral

Bilateral Exchange

Bilateral Monopoly (BIM)

Bilinear Flow

Biliousness

Bill

Bill and Keep

Bills

BIM (Building Information Modeling)

Bimetal

Bin Method

Binary

Binary Acid

Binary Code

Binary Comparison

Binary Cycle (Geothermal Power Plant)

Binary Cycle Power Station

Binary Digit (BIT)

Bind

Binder

Binding Energy

Bio

Bioassay

Biobank

Biocapacity

Biocatalyst

Biochemical

Biochemistry

Biochip

Biocide

Bioconcentration

Bioconversion

Biocycle

Biodegradable

Biodegradation

Biodiesel

Biodiversity

Bioecology

Bioenergy

Biofilm

Biofuel (Biomass Fuel)

Biofuel Generations

Biogas

Biogasification or Biomethanization

Biography

Bioinformatic

Biological

Biological Environmental Exposure Levels (BEELs)

Biological Indicator (BI)

Biological Treatment Technology

Biological Waste

Biology

Biomass

Biomass Energy (or Biomass Power)

Biomass Fuel

Biomass Gasification

Biome

Biomedical

Biometric Identification

Biomolecule

Biophotolysis

Biopolymer

Bioprocess Engineering

Bioprocessing

Biorhythm

bioRxiv

Biosphere

Biotechnology

Biotechnology Process

Biotechnology Product

Bioterrorism

BIPM (International Bureau of Weights and Measures)

Bipolar

Bipolar Electrodialysis (BPED)

BIS (Bank for International Settlements)

Bismuth (Bi)

Bit

Bitcoin

Bits per Second (BPS)

Bitumen

Bituminous Coating

Bituminous Sand

Black Friday

Black Hole

Black Ice

Black Light

Black Liquor

Black List (Blacklist)

Blackbody

Blanket Order

Blanketing

Blackout

Blast

Blast Angle

Blast Joint

Blast Load

Blast Proof

Blast Resilience

Blast Resistance

Blast Resistant Building

Blast Wave

Bleed Off

Bleeding

Blending Plant

Blind

Blind Flange

Blind Zone

Blister 

BLM (Building Lifecycle Management)

Bloating

Block

Block and Bleed

Block Copolymer

Block Diagram (BD)

Blockchain

Blocking

Blood Alcohol Concentration (BAC)

Blow

Blowdown

Blowdown Drum

Blowdown Valve (BDV)

Blower

Blown In Insulation

Blowout

Blowout Preventer (BOP)

BLS (Bureau of Labor Statistics)

Blue Chip

Blue Hydrogen

Bluetooth

Blur/ Blurring

Blush

Blushing

BM (Bill of Material)

BMS (Burner Management System)

Board

BOD (Biological (or Biochemical) Oxygen Demand)

Body Hydration

Body Mass Index (BMI)

Body of Water

Body Relief Valve (BRV)

BOE (Barrel of Oil Equivalent)

BOEM (Bureau Ocean Energy Management)

Bohrium (Bh)

Boil

Boil Off Gas (BOG)

Boil Over

Boiler

Boiler Feedwater

Boiler Horsepower

Boiler Pressure

Boiler Rating

Boilerplate

Boilerplate Clause

Boiling

Boiling Liquid Expanding Vapor Explosion (BLEVE)

Boiling Point

Boiling Water Reactor (BWR)

Bolt

BOM (Bill of Material)

Bona fide

Bonanza

Bond

Bond Energy (E)

Bond Enthalpy (H)

Bond Length

Bond Market

Bond Order 

Bonded Area

Bondholder

Bonding

Bonds and Notes

Bondsman

Bone (Oven) Dry

Bonny Light Oil

Bonus

Bonus-Penalty Contract

Book Value

Boolean Algebra

Boom

Boost

Booster

Booster Pump

Booster Station

Boot (or Stack Boot)

BOP (Balance of Plant)

BOQ (Bill of Quantity)

Border

Border Price

Border Protection

Borehole

Boring

Boron (B)

Botany

Bottle Test

Bottled Gas

Bottom of the Pyramid

Bottoming Cycle

Bounce

Bound

Boundary

Bowtie

BowTie Diagram

Boxing Day

Boyle's Law

bp (Basis Point)

BPCD (Barrel Per Calendar Day)

BPSD (Barrel Per Stream Day)

Bracelet Anode

Brackish Water

Brainstorming

Branch Point

Brand

Brand Competition

Brass 

Brayton Cycle

Braze

Breach

Breach of Contract

Bread Box System

Break Clause

Break Even (or Breakeven Point)

Breakdown Potential

Breakdown Pressure

Breakdown Strength

Breakdown Voltage

Breaker

Breakout

Breakthrough

Breakthrough Improvement

Breed

Brent Crude

Brexit (British Exit: The UK's EU Referendum)

Bribe

Bribery

Brick

Bricks and Clicks

Bricks and Mortar

BRICS

Bridge

Bridge Country

Bridge Loan (Bridging Loan)

Bridge Plug

Bridle

Brine

Brinell Hardness

Briquettes

Brittle

Brittle Fracture

Broad

Broad Money

Broker

Bromine (Br)

Bronchitis

Bronze 

Brown Coal

Brownfield

Brownfield Plant

Browsewrap Agreement

BRs (Building Regulations)

Brush Off Blast Cleaned Surface

BS&W (Bottom Sediment and Water)

BSI (British Standards Institution)

BTU (British Thermal Unit)

BTX (Benzene, Toluene and Xylene)

Bubble

Budget

Budget Allowance

Budget at Completion (BAC)

Budget Calendar

Budget Shift

Budgetary Control

Budgetary Cost

Budgetary Cost Estimate (Class 3)

Budgeted Cost for Work Performed (BCWP)

Budgeted Cost for Work Scheduled (BCWS)

Budgeting

Buffer 

Building

Building Detail Drawing

Building Envelope

Building Geographic Risk

Building Heat-Loss Factor

Building Layout Drawing

Building Orientation

Built-in Agenda

Bulb

Bulb Turbine

Bulk

Bulk Cargo

Bulk Carrier

Bulk Container

Bulk Density

Bulk Material

Bulk Station

Bulk Terminal

Bulk Volume

Bull and Bear Bond

Bulletin Board or Noticeboard

Bundle

Bundling

Bunker

Bunker Contribution

Bunny Bond

Buoyant Cloud

Burn

Burner

Burner Capacity

Burning Point

Burning Velocity

Burnish

Bus

Bus Bar (Busbar)

Business

Business Continuity Management Institute or BCM Institute

Business Continuity Plan (BCP)

Business Cycle (or Economic Cycle)

Business Day (or Normal Work Day)

Business Enterprise

Business Model or Method (BM)

Business Organisation

Business Sustainability

Butadiene (C4H6)

Butane (C4H10)

Butanol (C4H9OH, Butyl Alcohol)

Butene (C4H8)

Butt Weld

Butterfly Valve

Butylene (C4H8)

Buy

Buy-back

Buy-down

Buyer

Buyer's (Buyer) Credit

Buyout

Buyer's Market

Buying-in Price

Buyout Scheme

By All Means

By-product (Byproduct)

Bypass

Bypass Diode

Byte