ETYM Cf. French infinitésimal, from infinitésime infinitely small, from Latin infinitus. Related to Infinite.
Infinitely or immeasurably small; SYN. minute, microscopic.

ETYM Latin minutus, p. p. of minuere to lessen. Related to Minish, Minor, Menu, Minuet.
Characterized by painstaking care and detailed examination; SYN. narrow.

Tiny

Very small.

Of a size less than is common, proper, normal, or average

ETYM Colloq. and Scot.
(Homonym: we).
Very early.

In an infinitesimal manner, minutely