tuna/camel etymology of the day

OED:

[a. Pg. albacor, -bacora, -becora (Sp. albacora, Fr. albicore); f. Arab. al the + bukr, pl. bakārat, a young camel, a heifer, whence also Pg. bacoro a young pig. The Fr. form albicore is also in use.]

the smell of metal

Wikipedia:

Oct-1-en-3-one (CH2=CHC(=O)(CH2)4CH3), also known as 1-octen-3-one, is the odorant that is responsible for the typical metallic smell of metals and blood coming into contact with skin.[1] Oct-1-en-3-one has a strong metallic mushroom-like odor with an odor detection threshold of 0.03 - 1.12 µg/m³ and it is the main compound responsible for the "smell of metal", followed by decanal (smell: orange skin, flowery) and nonanal (smell: tallowy, fruity).[2] Oct-1-en-3-one is the degradative reduction product of the chemical reaction of skin lipid peroxides and Fe2+.