Entry 1 sense Webster, 1913 Bothrenchyma /bŏthrĕngʹkĭmə/ · Both·ren·chy·ma · IPA /bɒθˈɹɛŋkɪmə/ 01 n. Dotted or pitted ducts or vessels forming the pores seen in many kinds of wood. 1. Dotted or pitted ducts or vessels forming the pores seen in many kinds of wood.(Bot.)