διδύμια
From LSJ
μὴ ἐν πολλοῖς ὀλίγα λέγε, ἀλλ΄ ἐν ὀλίγοις πολλά → don't say little in many words, but much in a few words (Stobaeus quoting Pythagoras)
English (LSJ)
[ῠ], τά,
A small convexities near the pineal gland of the brain, Gal.UP8.14, al. II Dim. of δίδυμος 111.2, Paul.Aeg.6.68. III διδυμίου ῥίζα, = ὄρχις, Hsch.