вогнутый вниз, вверх
• The line is concave down(ward), up(ward).
• Downwardly (or Upwardly) concave ...
Источник:
Русско-английский научно-технический словарь
на Gufo.me
• The line is concave down(ward), up(ward).
• Downwardly (or Upwardly) concave ...