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The word "diode" is linguistically built on the concept that it's a two-terminal device: "di" means two, "-ode" is the same as in "electrode", "anode", "cathode", ...

A three-terminal device is a triode. However, unlike diode, that term is used exclusively for the vaccuum ones: i.e. arrangements of an anode, cathode and grid. With diodes we have semiconductor diodes as well as vacuum (or thermionic) diodes.

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Technically it is a triode but that word would be misleading here since this device is more like a diode with a MOSFET like insulated gate.

And the hollow-state triode is more or less the same thing as JFET, except it needs higher bias voltages.

That word would be misleading because it has been taken to refer to vacuum tubes.

I would call this a "trioptode". That incorporates the "tri" and "ode", plus a reference to that it is optical: the third terminal modulates light.

I will start refer to them as trioltodes.

and an octet of data carried through a gate like this is a... Trilobyte?

I have chosen LET, Light Emitting Triode, in the 2 minutes I have known about this

Can't wait for all the confusion in LET/LED pronunciation.

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