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Glossary: roe

February 15th, 2012 — 3:36pm

Usually refers to a mass of fish eggs or egg-laden fish ovary but sometimes separated into 'hard' and 'soft' roe in reference to the female and male gonads, respectively.

Glossary: rosette

February 15th, 2012 — 3:36pm

Roselike marking or collection of markings.

Glossary: rostral

February 15th, 2012 — 3:36pm

In fishes, of, like , or associated with the snout.

Glossary: rostral barbel

February 15th, 2012 — 3:36pm

Anterior maxillary barbel.

Glossary: rostral fold

February 15th, 2012 — 3:36pm

A groove between lip and snout.

Glossary: rostral spine

February 15th, 2012 — 3:36pm

Median dorsal structure located on the snout in certain fishes.

Glossary: rostrum

February 15th, 2012 — 3:36pm

In fishes, the snout.

Glossary: rotenone

February 15th, 2012 — 3:36pm

Chemical extracted from the roots of certain plants, used as a broad-spectrum insecticide, piscicide, and pesticide.

Glossary: rudimentary

February 15th, 2012 — 3:36pm

In biology, incompletely developed; embryonic; vestigial.

Glossary: ruggose

February 15th, 2012 — 3:36pm

Wrinkled, creased; having a rough surface.

Glossary: rugose

February 22nd, 2014 — 10:32pm

Wrinkled; corrugated.

Glossary: runoff

February 15th, 2012 — 3:36pm

Rainwater entering a water body as surface water rather than entering the water table or evaporating into the atmosphere.