The ⚀ennea·volumel, or ⚀thimble·volume, or ⚀teaspoon·volume

Quantityvolume
Formal name

⚀ennea·volumel

Formal abbr⚀e•vmℓ 
Colloquial name⚀thimble·volume
⚀teaspoon·volume
Colloquial abbr⚀θi·vm
⚀tsp·vm
Derivation9 ⚀morsel·volume
Derivation abbr9 ⚀mo·vm
TGM equiv

≈ 4 quadcia·Volm

TGM equiv abbr 4 q↓Vm
SI & USC equiv

= 0.37780576z=0.3030497233072916inch3
 0.16792365620491d fluid ounce
 1.00754193722944d teaspoon
= 4.9660952110188802083d milliliter 

scaling01:06:+:00:9.0000