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[[Borer]]

1. One that bores; an [[instrument]] for [[boring]].

2. (Science: [[marine]] biology) a [[marine]], [[bivalve]] [[mollusk]], of the [[genus]] [[teredo]] and [[allies]], which [[burrows]] in [[wood]]. See [[teredo]]. Any [[bivalve]] [[mollusk]] ([[saxicava]], [[lithodomus]], etc) which [[bores]] into limestone and [[similar]] [[substances]].

One of the [[larvae]] of many [[species]] of [[insects]], which [[penetrate]] [[trees]], as the [[apple]], [[peach]], [[pine]], etc. See [[apple]] [[borer]], under [[apple]].

The hagfish (Myxine).