larval

[lahr-vuh l]

adjective

of, relating to, or in the form of a larva.
Also lar·vate [lahr-veyt] /ˈlɑr veɪt/. (of a disease) masked; not clearly defined.

Origin of larval

From the Latin word larvālis, dating back to 1650–60. See larva, -al¹

Related formspost·lar·val, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

The absence of a pneumatic duct in the Physoclisti would appear to be due to a post-larval atrophy.
The Works of Francis Maitland Balfour, Volume III (of 4)
Francis Maitland Balfour

1650s, from Latin larvalis, from larva (see larva).