Option A: Gemini Notebook: defines terms from your documents
Best when: You already hold the documents as files or web pages
What it does: Gemini Notebook defines from your sources; you check each entry
Strong at: Answers stay tied to your own sources
Limit: Source limits and plan terms still to confirm
Free plan: Yes, limited (100 notebooks, 50 sources per notebook)
Option B: Claude: defines terms from pasted excerpts
Best when: Documents are long and you only need a handful of terms
What it does: Claude defines from excerpts; you check the quoted words
Strong at: You control exactly which text the assistant sees
Limit: Excerpts lose the wider context; some definitions may be thin
Free plan: Yes, limited (5-hour session and weekly caps)
Option C: Claude: drafts entries from tagged passages
Best when: You want each first draft written, with documents in Zotero
What it does: Claude drafts entries from your passages; you check and approve
Strong at: Every entry points to its exact passage; final wording is yours
Limit: Cited page covers writing in general, not passage-tied definitions
Free plan: Yes, limited (5-hour session and weekly caps)