Ichthyotoxin

Part of speech: noun

Definitions

1. A toxic substance derived from specific fish species that can adversely affect the health of other animals or humans through exposure to their venomous properties
2. A harmful biological agent secreted by certain fishes capable of inducing illness or injury in other living beings upon contact or ingestion
3. A poisonous compound produced by certain fish that can cause detrimental health effects in other organisms or humans when encountered or consumed

Etymology: Ichthyotoxin is a plain scientific coinage, built from two Greek-derived parts. "Ichthyo-" comes from the Greek "ikhthys", meaning "fish", and "toxin" comes from the Greek "toxikon", meaning poison for arrows, from "toxon", a bow, and dates to the 19th century in its modern sense. Put together, the word names any poison produced by fish or found in their tissues, a meaning that describes the substance's source rather than its effect. The prefix "ichthyo-" appears in many other technical terms, such as "ichthyology", the study of fish, and "ichthyosaur", a marine reptile whose name means "fish lizard". The same combining form lets scientists name a whole family of substances by their source in a single compound, so the word needs no further history to be understood.