1. Plural of perisarc; the chitinous or horny outer covering secreted by hydroids and some other colonial marine organisms.
Usage: biology; zoology; technical

Examples

• The perisarcs of the hydroid colony provide structural support and protection.
• Marine biologists examined the perisarcs under a microscope to identify the species.
• The delicate perisarcs encased the polyps of the colonial organism.
• Different hydroid species produce perisarcs with distinct morphological features.
• The perisarcs help the hydroids resist damage from water currents and predators.