Rb Rb /ɑːrˈbiː/

noun

1. A soft silvery metallic element of the alkali metal group; burns in air and reacts violently in water; occurs in carnallite and lepidolite and pollucite  ( atomic number 37 , Rb , rubidium )
   a soft silvery metallic element of the alkali metal group; burns in air and reacts violently in water; occurs in carnallite and lepidolite and pollucite
   
   

 birch leaf miner birch leaf miner /bɜːrtʃ liːf ˈmaɪnər/

noun

1. Small black sawfly native to Europe but established in eastern United States; larvae mine the leaves of birches causing serious defoliation  ( birch leaf miner , Fenusa pusilla )
   small black sawfly native to Europe but established in eastern United States; larvae mine the leaves of birches causing serious defoliation
   
   

 uncial uncial /ˈʌnsiəl/

adjective

1. Relating to or written in majuscule letters (which resemble modern capitals)  ( uncial )
   relating to or written in majuscule letters (which resemble modern capitals)
    Uncial letters
   uncial letters
   

noun

1. A style of orthography characterized by somewhat rounded capital letters; found especially in Greek and Latin manuscripts of the 4th to 8th centuries  ( uncial )
   a style of orthography characterized by somewhat rounded capital letters; found especially in Greek and Latin manuscripts of the 4th to 8th centuries
    In the museum, there's a manuscript written in uncial script.
   In the museum, there's a manuscript written in uncial script.
   
   

 epidemic cholera epidemic cholera /ˌɛpɪˈdɛmɪk ˈkɒlərə/

noun

1. An acute intestinal infection caused by ingestion of contaminated water or food  ( Asiatic cholera , cholera , epidemic cholera , Indian cholera )
   an acute intestinal infection caused by ingestion of contaminated water or food