Seriously Fish
AdminAccount
AdminAccount

Glossary

Glossary

Every technical term used here, defined.

Terms
1,702
With an illustration
23
Cross-references
66
Used in profiles
1,807

18 terms beginning with U

  1. ubiquitous

    Found, appearing or present everywhere.

    Used in 29 profiles

  2. ultraviolet

    Invisible, continuous spectrum of light having a wavelength just shorter than the violet end of the visible spectrum but longer than that of x-rays.

  4. unculi

    Plural of unculus.

    Used in 7 profiles

  6. unculus

    Horny projection originating from a single cell of the epidermis found on the disc of Garra sp. and catfishes of the family Sisoridae, for example.

  7. undergravel filter

    A filter which works by drawing water down through the substrate, where the cycle bacteria colonies are located, before returning it to the aquarium. Difficult to keep clean and now considered old fashioned.

  8. undulate

    To move in a smooth, wavelike motion; possessing a wavelike appearance or form.

  9. undulating

    Moving in a smooth, wavelike fashion.

    Used in 5 profiles

  10. unicuspid

    Having a single point or cusp. Commonly used in reference to teeth of such form.

    Used in 15 profiles

  11. uninomen

    Scentific name comprising a single word, used for taxa higher than genus.

  12. unisexual

    Fish species of which all individuals are the same gender.

  13. unpaired fins

    The dorsal, caudal, anal and, if present, adipose fins.

    Used in 61 profiles

  14. urogenital

    Of, relating to, or denoting both the urinary and genital organs.

    Used in 2 profiles

  17. urostyle

    Upturned, posterior tip or backwardly-orientated process of the lower vertebral column, generally comprised of fused vertebrae; series of bones articulating with the last true vertebra; usually included when counting vertebrae.

    Used in 8 profiles

  18. uv

    Abbreviation of ultraviolet.

    Used in 1 profile