(botany) To open at definite places, discharging seeds, pollen, or other contents, as the ripe capsules or pods of some plants. 

(medicine) To rupture or break open, as a surgical wound.

[Latin dehscere : d-, de- + hscere, to split, inchoative of hire, to be open.]

 Mark Andrew Webber: 296 linocut linomation for the Art of Lost Words. Via Drawn.