Webster's 1913 Dictionary
NAISSANT
Nais `sant ", a. Etym: [F., p. pr. of naître to be born, L. nasci.](Her. )
Defn: Same as Jessant.
New American Oxford Dictionary
naissant
nais sant |ˈnāsənt ˈneɪsənt | ▶adjective Heraldry (of a charge, esp. an animal ) issuing from the middle of an ordinary, esp. a fess. ORIGIN late 16th cent.: from French, literally ‘being born, ’ present participle of naître, from Latin nasci ‘be born. ’
Oxford Dictionary
naissant
naissant |ˈneɪs (ə )nt | ▶adjective Heraldry (of a charge, especially an animal ) issuing from the middle of an ordinary, especially a fess. ORIGIN late 16th cent.: from French, literally ‘being born ’, present participle of naître, from Latin nasci ‘be born ’.
French Dictionary
naissant
naissant , ante adj. adjectif Qui vient de naître. : Des bébés naissants. Note Sémantique Ne pas confondre avec le participe présent invariable naissant. Faut-il plaindre ou envier les bébés naissant un 29 février?
The Wordsmith Dictionary