An Etymological Dictionary of Astronomy and Astrophysics

A prefix with several meanings: “characterized by,” “of the nature of,”
“belonging to or connected with a division of animals characterized by or of the nature of,” “belonging to or connected with a family of plants of the nature of.”

Etymology (EN): From L. -aceus.

Etymology (PE): -âsâ a suffix denoting “resemblance; nature; relation,” from Mid.Pers. suffix -ihâ forming adverbs.