black tail disease
whirling disease (a parasitic disease of trout caused by the myxosporidean protozoan Myxosoma cerebralis. The parasite enters spine of the fish at a stage before the cartilage has turned to bone. Causes bent spines which force the fish to swim in the characteristic "whirling" motion, that is also called tail hunting. The spores of the parasites can remain in the mud of ponds for a long time. Also called twist disease)

Dictionary of ichthyology. 2009.

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  • Black — (bl[a^]k), a. [OE. blak, AS. bl[ae]c; akin to Icel. blakkr dark, swarthy, Sw. bl[ a]ck ink, Dan. bl[ae]k, OHG. blach, LG. & D. blaken to burn with a black smoke. Not akin to AS. bl[=a]c, E. bleak pallid. [root]98.] 1. Destitute of light, or… …   The Collaborative International Dictionary of English

  • Black act — Black Black (bl[a^]k), a. [OE. blak, AS. bl[ae]c; akin to Icel. blakkr dark, swarthy, Sw. bl[ a]ck ink, Dan. bl[ae]k, OHG. blach, LG. & D. blaken to burn with a black smoke. Not akin to AS. bl[=a]c, E. bleak pallid. [root]98.] 1. Destitute of… …   The Collaborative International Dictionary of English

  • Black and tan — Black Black (bl[a^]k), a. [OE. blak, AS. bl[ae]c; akin to Icel. blakkr dark, swarthy, Sw. bl[ a]ck ink, Dan. bl[ae]k, OHG. blach, LG. & D. blaken to burn with a black smoke. Not akin to AS. bl[=a]c, E. bleak pallid. [root]98.] 1. Destitute of… …   The Collaborative International Dictionary of English

  • Black angel — Black Black (bl[a^]k), a. [OE. blak, AS. bl[ae]c; akin to Icel. blakkr dark, swarthy, Sw. bl[ a]ck ink, Dan. bl[ae]k, OHG. blach, LG. & D. blaken to burn with a black smoke. Not akin to AS. bl[=a]c, E. bleak pallid. [root]98.] 1. Destitute of… …   The Collaborative International Dictionary of English

  • Black antimony — Black Black (bl[a^]k), a. [OE. blak, AS. bl[ae]c; akin to Icel. blakkr dark, swarthy, Sw. bl[ a]ck ink, Dan. bl[ae]k, OHG. blach, LG. & D. blaken to burn with a black smoke. Not akin to AS. bl[=a]c, E. bleak pallid. [root]98.] 1. Destitute of… …   The Collaborative International Dictionary of English

  • Black bear — Black Black (bl[a^]k), a. [OE. blak, AS. bl[ae]c; akin to Icel. blakkr dark, swarthy, Sw. bl[ a]ck ink, Dan. bl[ae]k, OHG. blach, LG. & D. blaken to burn with a black smoke. Not akin to AS. bl[=a]c, E. bleak pallid. [root]98.] 1. Destitute of… …   The Collaborative International Dictionary of English

  • Black beast — Black Black (bl[a^]k), a. [OE. blak, AS. bl[ae]c; akin to Icel. blakkr dark, swarthy, Sw. bl[ a]ck ink, Dan. bl[ae]k, OHG. blach, LG. & D. blaken to burn with a black smoke. Not akin to AS. bl[=a]c, E. bleak pallid. [root]98.] 1. Destitute of… …   The Collaborative International Dictionary of English

  • Black beetle — Black Black (bl[a^]k), a. [OE. blak, AS. bl[ae]c; akin to Icel. blakkr dark, swarthy, Sw. bl[ a]ck ink, Dan. bl[ae]k, OHG. blach, LG. & D. blaken to burn with a black smoke. Not akin to AS. bl[=a]c, E. bleak pallid. [root]98.] 1. Destitute of… …   The Collaborative International Dictionary of English

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