racem- +

(Latin: cluster of grapes or berries)

A flower cluster inflorescence in which the flowers are borne on short stalks along a long main stem, as they are in the lily of the valley; from Latin racemus, "bunch of grapes".
Referring to, or designating, an acid found in many kinds of grapes.

It is also obtained from tartaric acid, with which it is isomeric, and from sugar, gum, etc., by oxidation. It is a sour white crystalline substance, consisting of a combination of dextrorotatory and levorotatory tartaric acids.

racemic acid
1. A form of tartaric acid from grape juice that does not deflect or absorb any of the light passing through it.
2. An optically inactive form of tartaric acid which can be separated into dextrorotatory and levorotatory components and is sometimes found in grape juice during the making of wine.
Conversion of an optically active substance to a racemic form.
racemose aneurysm
An aneurysm that is a localized widening (dilatation) of an artery, vein, or the heart.

At the area of an aneurysm, there is typically a bulge and the wall is weakened and may rupture. The word "aneurysm" comes from the Greek aneurysma meaning "a widening". A racemose aneurysm looks like a bunch of grapes.

racemose, racemous
1. Resembling a bunch of grapes on its stalk.

2. A descriptive term for something that is in a cluster or bunch.

From the Latin racemus, meaning "a cluster" or "bunch"; especially, of "grapes".

Growing in very small racemes or clusters.

Cross references of word families that are derived directly, or indirectly, from: "grape, grapes": acin-; staphyl-; uveo-; uvul-.