The corpus record

διόπτρ-α

dioptra · ἡ

optical instrument

Generated live from the audited corpus — every figure on this page is a database query, not prose from memory.

What it meant

διόπτρ-α · dioptr-a — LSJ

optical instrument

optical instrument for measuring angles, altitudes, etc., Euc. Phaen. p.10M., Plb. 10.46.1, Attal. ap. Hipparch. 1.10.24, Gem. 1.4, Ptol. Alm. 5.14, etc.; ἡ τῶν δ. θεωρία Gem. 5.11.

2 aperture-sight

aperture-sight in a torsion-engine, Ph. Bel. 64.9, 76.48.

II plate of talc

plate of talc for glazing windows, Str. 12.2.10.

III

= διαστολεύς, Aët. 16.89, Paul.Aeg. 6.73.

σημεῖον ἐν θυτικῇ, Hsch.

Where it came from

No etymology authority pointer is recorded for this lemma yet — an honest gap, not an omission. The etymological dictionaries (Beekes, Chantraine, Frisk) are matched incrementally.

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