rubidus

Latin rubidus

rubidus (plural rubiduses)

1. A butterfly, hybrid between the viceroy (Limenitis archippus) and the red-spotted purple (Limenitis arthemis astyanax).

From Proto-Indo-European *h₁rewdʰ- (“red”) +‎ -idus. Related to rubeō (“to be red”), but the different ablaut grades suggest that the adjective is not directly derived from the stative verb.[1]

• (Classical) IPA^(key): /ˈruː.bi.dus/, [ˈruːbɪd̪ʊs̠]
• (modern Italianate Ecclesiastical) IPA^(key): /ˈru.bi.dus/, [ˈruːbid̪us]

rūbidus (feminine rūbida, neuter rūbidum); first/second-declension adjective

1. dark red
   • c. 200 BCE, Plautus, Stichus 230, (iambic senarius):

     robiginosam strigilem, ampullam rubidam

   • c. 177 CE, Aulus Gellius, Noctes Atticae 2.26.14:

     "Rubidus" autem est rufus atrior et nigrore multo inustus

     However, "rubidus" is a darker red and burned with much blackness.

2. (of bread, precise meaning uncertain) red-brown (or) twice-baked (or) partially baked
   • c. 180 BCE, Plautus, Casina 310, (iambic senarius):

     atque ibi torreto me pro pane rubido

First/second-declension adjective.

• rūfus

• rubīnus

• “rubidus”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• rubidus in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.