Perforatum

Part of speech: adjective, past participle

Definitions

1. A term used to refer to a structure that has holes or openings, particularly in anatomy where it denotes a specific part of a muscle or nerve
2. Describing an anatomical feature characterized by perforations, often associated with certain tissues or organs such as the perforated membranes
3. Relating to a biological aspect marked by multiple openings, typically found in certain physiological contexts like the perforated eardrum

Etymology: Latin "perforatus" is the past participle of "perforare," meaning "to bore through," built from "per" (through) and "forare" (to bore). The neuter form "perforatum" is the one that turns up in scientific Latin, where it names structures pierced by openings. The clearest anatomical example is the "substantia perforata anterior," or anterior perforated substance, a region of grey matter at the base of the brain. Its surface is dotted with tiny openings through which small blood vessels enter the tissue, so anatomists named it for the holes rather than for the tissue itself. The most familiar bearer of the adjective, though, is a plant: Hypericum perforatum, St John's wort. Its leaves look pricked with a pin because they contain translucent oil glands that show as pale dots when held to the light. The name describes that appearance, not a true perforation.

Synonyms: perforated, pierced, punctured, bored, penetrated

Antonyms: solid, intact, unperforated, whole, unbroken