A columella is a non-reproductive structure that extends into and supports the sporangium.
Capillitial threads are very minute forms of slime mold. A columella has numerous threads radiating from all sections of the cell.
Lucius Junius Moderatus Columella is the most important writer on agriculture of the Roman Empire. He was born in A.D. 4 and died in A.D. 70. His most notable work is 'De re rustica'
Columella (is the part you see from the outside) Nasal septum (is the internal separating structure)
If you are talking about the structure just underneath the interior division of the nose, it's called the columella.
The proper name for a water snail is an aquatic snail.
Benjamin Freeman Kingsbury has written: 'Histological technique' -- subject(s): Laboratory manuals, Histology 'The Columella auris in Amphibia'
The 'black dots' (or 'brown dots') on the underside of fern fronds are reproductive structures. They are called sori(the singular is sorus). Within the sorus is a central column (columella), covered by a hard cover, the indusium (the cover you see and call the black dot). Sprouting beneath the indusium (ferns usually have indusia, but not always) and attached to the columella are sporangia, spore-bearing capsules. The fern is the spore-bearer, the sporophyte stage of the fern life cycle.
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 1 words with the pattern ---U---LA. That is, nine letter words with 4th letter U and 8th letter L and 9th letter A. In alphabetical order, they are: columella
The area is called the philcrum. The pit in the middle of the philtrum is called the sulcus. The two ridges (lines as you say) are called the philtral rdiges. The philtrum joins the nose at the area called the columella. The philtrum joins the lip at the place called the tubercle.
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern ---U-EL--. That is, nine letter words with 4th letter U and 6th letter E and 7th letter L. In alphabetical order, they are: columella vuvuzelas
According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern C--U---L-. That is, nine letter words with 1st letter C and 4th letter U and 8th letter L. In alphabetical order, they are: clouterly columella