
1) Fish
Found on
https://www.crosswordclues.com/clue/tenuis

Latin, meaning: thin, slight, feeble, slim, slender.
Found on
http://archives.nd.edu/ttt.htm

• (n.) One of the three surd mutes /, /, /; -- so called in relation to their respective middle letters, or medials, /, /, /, and their aspirates, /, /, /. The term is also applied to the corresponding letters and articulate elements in other languages.
Found on
http://thinkexist.com/dictionary/meaning/tenuis/

(from the article `paracanthopterygian`) ...into a specialized larva, the vexillifer, which lives amid the plankton. After attaining a length of about seven to eight centimetres (about three ...
Found on
http://www.britannica.com/eb/a-z/t/26
Ten'u·is noun ;
plural Tenues . [ New Latin , from Latin
tenuis fine, thin. See
Tenuous .]
(Gr. Gram.) One of the three surd mutes κ, π, τ; -- so called in relation to their respective middle letters, or medials, γ, β, ;...
Found on
http://www.encyclo.co.uk/webster/T/28

thin, slight, feeble, slim, slender.
Found on
https://www.math.ubc.ca/~cass/frivs/latin/latin-dict-full.html
No exact match found.