DictionaryWords are stored in data/dict.json file.I am commonly concerned in the case of plugins of this kind, that they are not accessing another site, for the definition, etc. That the lexicon, in this case, is stored locally.

That's a tall order, for a dictionary, in a plugin. It appears, in this case, that the plugin does not come with a lexicon, which means it isn't 'really' a dictionary, until you type all the words that are expected in a dictionary, into it. ;-)

It might be closer to "Definitions", or "Glossary". But given that it's unencumbered, simple, straightforward ... this would be a plugin of interest & use to me.

The only hitch here, is that I will want the plugin to be associated with terms in the content, rather than doing random displays in the sidebar.

Converter

Like with a dictionary, having the data installed locally is a key thing, but in the case of units-conversion it is less a matter of the size & volume, and more a case of bringing suitable acumen to bear on the compilation of units and their sometimes-oddball relationships. I suspect that there may now be a free library for the data, and one can just make a wrapper...

This sounds like one I will have to try right away. I am a long-time chem/phys/nuke stoichiometry guy. And recipes sound fun too.

The others are off my radar, but one ringer & one hand grenade isn't bad.