The ⚀bi.dot.trina·unqua·volumel, or ⚀thumb·volume, or ⚀tablespoon·volume

Quantityvolume
Formal name

⚀bi.dot.trina·unqua·volumel
⚀bitrina·volumel
⚀hexdubcia·hand·volume

Formal abbr

⚀b.t•uvmℓ 
⚀bt•vmℓ

Colloquial name⚀thumb·volume
⚀tablespoon·volume
Colloquial abbr⚀θu·vm
⚀tbsp·vm
Derivation

23z ⚀morsel·volume
2−6 ⚀hand·volume

(⚀thumb·length)3

Derivation abbr

23z ⚀mo·vm
2−6
⚀hd·vm
(θu·lg)3

TGM equiv

≈ 1 tricia·Volm

TGM equiv abbr≈ 1 t↓Vm
SI & USC equiv

= 0.ᘔᘔƐ014ᘔ6z=0.909149169921875d inch3
≈ 0.50377096861472fluid ounce
≈ 1.00754193722944d tablespoon
= 14.898285633056640625d milliliter

scaling01:06:+:01:2.3000