Inferior laryngeal vein

What is Inferior laryngeal vein?

Inferior laryngeal vein definition and meaning on Dictionary terms:
feeble or weak in body or health, especially because of age; ailing.
unsteadfast, faltering, or irresolute, as persons or the mind; vacillating: infirm of purpose.
not firm, solid, or strong: an infirm support.
unsound or invalid, as an argument or a property title.

verb (used with object)
to invalidate.