Third-person singular simple present indicative form of reecho

plural of reef knot

(topology) (of a foliation) Not containing a Reeb component.

(topology) A solid torus whose boundary is a leaf of a foliation of the ambient 3-dimensional manifold.

A spool, or bobbin used to keep cotton thread tidy. / A Scottish highland country dance. A 4x40 bar reel for 4 couples in a 4-couple longwise set.

A massive system of coral reefs, found in the Coral Sea off the coast of Australia.

An audio recording medium consisting of magnetic tape that runs from one reel to another passing the record and playback heads.

Alternative spelling of reel-to-reel tape

A type of audio recording device that uses reel-to-reel tape

A machine that records sound onto, or plays sound from, tape wound on one reel, by feeding it through to another reel.