13-letter words containing b, o, k, c, l
- necklace bomb — a bomb consisting of linked charges hung around a victim's neck, used by terrorists or in hostage situations
- news blackout — a situation in which a government or other authority imposes a ban on the publication of news on a particular subject
- opossum block — (in New Zealand) a block of bush allocated to a licensed opossum trapper
- road-blocking — an obstruction placed across a road, especially of barricades or police cars, for halting or hindering traffic, as to facilitate the capture of a pursued car or inspection for safety violations.
- rock barnacle — any marine crustacean of the subclass Cirripedia, usually having a calcareous shell, being either stalked (goose barnacle) and attaching itself to ship bottoms and floating timber, or stalkless (rock barnacle or acorn barnacle) and attaching itself to rocks, especially in the intertidal zone.
- rock climbing — the sport of climbing sheer rocky surfaces on the sides of mountains, often with the aid of special equipment.
- symbolic link — (file format) (SYLK) A Microsoft file format for spreadsheets, (not to be confused with symbolic link). SYLK format existed in one form or another in as early as 1987, and was part of Excel v1.0. It is is an outgrowth of VisiCalc DIF file format. SYLK format is ascii text and represents information about both formula, value, and some formatting information, which makes it something like an RTF for spreadsheets. It is used as a general tabular data exchange format.
- throttle back — If you throttle back, or you throttle back the engine, when driving a motor vehicle or flying an aircraft, you make it go slower by reducing the quantity of fuel entering the engine.
- truck bolster — the upper transverse member of a car truck that holds the truck center plate and receives the car's weight.
- vercelli book — a codex of Old English poems and sermons found in the chapter house at Vercelli.