Polymath 579

[May-bell-09]

Last one I cannot solve:
7d. Diagonal rib or groin of a Gothic vault(5) O?I?E
Any ideas?

[bibblebub]

ogive http://www.thefreedictionary.com/ogive

[Buenchico]

ogive

[May-bell-09]

Thank you very much, clear as daylight in the dictionary!

[DewsburyRam]

11 a Solid deposit from a solution after chemical reaction
27 Species of sturgeon

Thanks in advance for your help

[shaneystar2]

Precipitate
Sevruga

[Lie-in King]

Hi DewsburyRam - it's considered good form to start your own thread & to include the numbers of letters & any you've placed - for next time? Thanks! :-)

That said -

11a Precipitate
27a Sevruga

[DewsburyRam]

Lie-in King - apologies, I'm happy to share any answers, but just come on here as I'm stuck. Thanks for the answers.