rubidus

English

Etymology

Latin rubidus

Noun

rubidus (plural rubiduses)

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

Latin

Etymology

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.

Pronunciation

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

Adjective

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

Declension

First/second-declension adjective.

Number	Singular				Plural
Case / Gender	Masculine	Feminine	Neuter		Masculine	Feminine	Neuter
Nominative	rūbidus	rūbida	rūbidum		rūbidī	rūbidae	rūbida
Genitive	rūbidī	rūbidae	rūbidī		rūbidōrum	rūbidārum	rūbidōrum
Dative	rūbidō		rūbidō		rūbidīs
Accusative	rūbidum	rūbidam	rūbidum		rūbidōs	rūbidās	rūbida
Ablative	rūbidō	rūbidā	rūbidō		rūbidīs
Vocative	rūbide	rūbida	rūbidum		rūbidī	rūbidae	rūbida

Synonyms

• rūfus

Related terms

• rubīnus

Further reading

• “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.