My first link (which includes illustrations) refers to the official Americal terminology of the OSHA.

In-Running Nip Points (Figure 8), also known as “pinch points,” develop when two parts move together and at least one moves in rotary or circular motion. In-running nip points occur whenever machine parts move toward each other or when
one part moves past a stationary object. Typical nip points include gears, rollers, belt drives, and pulleys.
https://www.osha.gov/Publications/osha3170.pdf

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Note added at 3 Stunden (2017-09-12 11:08:25 GMT)
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My second link (again including an image) refers to the terminology of the official British standards (BS/ISO).


Caution Pinch Point Signs
1 customer review
Advise staff and visitors about the risks of pinch points on machinery

The Health & Safety (Safety Signs and Signals) regulations 1996 state that hazard signs must be displayed to warn people to be careful or to take precautions where hazards exist
Universal application - can be positioned as required
Conforms to BS 5499
http://www.seton.co.uk/caution-pinch-point-signs.html

Caution Pinch Point Signs
All symbols, where applicable, conform to ISO 7010
http://www.seton.co.uk/caution-pinch-point-signs.html#HZ057U...

Warnzeichen dienen der Kennzeichnung von Hindernissen und Gefahrstellen, an denenGefährdung z. B. Anstoß-, Quetsch-, Sturz- oder Stolpergefahr oder die Gefahr des Fallens von Lasten, besteht.

Nach DIN 4844-2 sind Warnzeichen mit dem Kennzeichnungsbuchstaben W eine Untergruppe der Sicherheitszeichen. Demgegenüber spricht man bei der Kennzeichnung gefährlicher Stoffeigenschaften nach Richtlinie 67/548/EWG (Gefahrstoff) vonGefahrensymbolen,
:
Warnung vor Einzugsgefahr
https://de.m.wikipedia.org/wiki/Warnzeichen



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Note added at 1 day3 hrs (2017-09-13 11:36:13 GMT)
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Medium/Heavy Duty Truck Engines, Fuel & Computerized Management Systems
By Sean Bennett
:
FIGURE 3-5 Generic safety symbols.
Risk of entanglement
https://books.google.de/books?id=dn9TCwAAQBAJ&pg=PA64&lpg=PA...
(Published in USA)

Remember that gloves can pose a serious entanglement risk at drilling machines and other machinery with rotating parts. These machines should be effectively guarded and gloves must not be worn where there is a risk of entanglement.
https://www.google.de/url?sa=t&rct=j&q=&esrc=s&source=web&cd...
(Published in UK)

Rotating equipment: Drilling and service rigs have a lot of rotating equipment, which requires everyone’s vigilance at all times. Most drilling companies try to engineer the hazards out, but sometimes people need to go up an elevated area to look down a hole or connect some rigging, and the unexpected happens. Besides the ever-present danger of being struck by rotating equipment, there is a risk of entanglement. To prevent fall protection gear from being entangled in the draw-works, rotating kelly bar, rotary table or other machinery, workers must remove their fall protection gear when it’s not needed.
Man lifting: Only a man-rated hoist is meant to lift a person. Unfortunately, some rigs still use material-rated lifts for this purpose. Workers being raised on non-man-rated devices could be exposed to entanglement hazards, and these hoists are strong enough to pull a worker apart, says Lapp. Dangerous practices can result in a worker being propelled out of a bucket or off a lift.
http://www.cos-mag.com/personal-process-safety/29973-the-ups...
(Published in Canada)

Ensuring the wood chipper is set up with sufficient clearance from the immediate working
area or drop zone to remove the risk of entanglement from climbing or lowering ropes.
https://www.google.de/url?sa=t&rct=j&q=&esrc=s&source=web&cd...
(Published in Australia)