
1) Dry, three-chambered fruit
Found on
https://www.crosswordclues.com/clue/regma

• (n.) A kind of dry fruit, consisting of three or more cells, each which at length breaks open at the inner angle.
Found on
http://thinkexist.com/dictionary/meaning/regma/
Reg'ma noun [ New Latin , from Greek ............, -........., fracture, from .................. to break.]
(Botany) A kind of dry fruit, consisting of three or more cells, each which at length breaks open at the inner angle.
Found on
http://www.encyclo.co.uk/webster/R/40

A regma is a dry fruit characteristic of the geranium family. It is similar to the carcerulus but breaks up into one-seeded parts, each of which splits open to release a seed.
Found on
http://www.probertencyclopaedia.com/browse/BR.HTM
No exact match found.